Physics High School
Answers
Answer 1
Answer:
K.E. = 49000 J
Explanation:
K.E. = 1/2 m v^2
Where
K.E. = Kinetic Energy
m= mass
v= velocity
Simply replace
K.E. = 1/2 (0.2 kg) (700 m/s)^2
K.E. = 49000 J
Note that the units convert to J here
I hope this helped!
Related Questions
in which of these galaxies would you be least likely to find an ionization nebula heated by hot young stars?
Answers
You would be least likely to find an ionization nebula heated by hot young stars in an elliptical galaxy.
Elliptical galaxies are generally old and do not have much ongoing star formation, so they are less likely to have hot young stars that can ionize gas and create ionization nebulae. In contrast, spiral galaxies like the Milky Way often have regions of active star formation, where massive young stars heat up surrounding gas and create ionization nebulae. Irregular galaxies can also have ongoing star formation and thus may have ionization nebulae. However, elliptical galaxies are dominated by older, redder stars and lack the gas and dust necessary to form new stars, so they are not likely to host ionization nebulae.
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Julie sits on a swing. Her free-body diagram is shown. A free body diagram with 2 force vectors. The first vector is pointing downward, labeled F Subscript g Baseline = negative 265 N. The second vector is pointing upward, labeled F Subscript N Baseline = 265 N. The vectors are the same length. The net force on Julie is N.
Answers
Based on the given information, we can conclude that the net force on Julie is zero N. This is because the upward force (labeled as F_N) is equal in magnitude to the downward force due to gravity (labeled as F_g), and they act in opposite directions. Mathematically, we can express this as:
Net force = F_N - F_g = 265 N - (-265 N) = 530 N
Since the net force is equal to 530 N in the upward direction and there are no other forces acting on Julie in the horizontal direction, she will remain in a state of rest or uniform motion (i.e., swinging back and forth at a constant speed).
This is an example of balanced forces, where the forces acting on an object are equal in magnitude and opposite in direction, resulting in a net force of zero N and no acceleration of the object.
Answer:
Explanation:
if two balloons are hanging from a string next to each other and you blow air in between the balloons, what happens to the balloons in respect to each other? will the balloons come together (inward), go apart (outward), or move randomly? explain why.
Answers
If two balloons are hanging from a string next to each other and when air is blown in between two balloons hanging from a string, due to pressure they will move: apart (outward),
Balloons move apart (outward) when air is blown in between them, When air is blown in between two balloons, it creates a high-pressure region that pushes the balloons away from each other. The air molecules move from a region of high pressure (where the air is being blown from) to a region of low pressure (between the balloons), which pushes the balloons away from each other.
This is because of the high pressure of the air molecules that come from the balloon which makes contact with the air in the room. Then, the air molecules move in a high-speed motion and collide with the other balloon. Then, the process repeats, which pushes the two balloons apart.
Moreover, this is similar to how the movement of air molecules causes the wind. When air molecules move from a high-pressure region to a low-pressure region, the wind is created. Similarly, the air molecules moving from the balloon create a high-pressure region that pushes the balloons away from each other.
This is an example of the Bernoulli principle, which states that when the velocity of a fluid increases, its pressure decreases. The air molecules moving between the balloons increase their velocity, which creates a low-pressure region and pushes the balloons apart.
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what is the difference between Aerobic exercise and Anaerobic exercise?
Answers
Answer:
Aerobic, which means "with air," describes how the body uses oxygen to produce energy. Usually, this refers to any workout that lasts more than two minutes. Constant aerobic activity is referred to as "steady state" exercise. Anaerobic refers to the body's ability to produce energy without oxygen and implies "without air".
Explanation:
Brainliest pls
3c does it take more, equal, or less power for a helicopter to hover at the top of a high mountain than it does at sea level? explain.
Answers
It takes more power for a helicopter to hover at the top of a high mountain than it does at sea level. This is because at higher altitudes the air is thinner, so the helicopter needs to spin its blades faster in order to generate enough lift to remain airborne.
The air density is lower at higher altitudes due to the decrease in atmospheric pressure. This reduction in air density means that there are fewer air molecules available for the helicopter's rotors to push down on, resulting in less lift being generated.
To maintain altitude, the helicopter needs to increase the speed of the rotors or increase the angle of attack, which requires more power. In contrast, at sea level, the air density is higher, which means that the helicopter's rotors can generate more lift with less power.
Therefore, to maintain a stable hover at the top of a high mountain, a helicopter needs to consume more power compared to hovering at sea level.
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visible light and radio waves are both examples of radiation, which has a dual nature, possessing the properties of both and waves. is called
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Visible light and radio waves, which have a dual nature, possess the properties of both light and waves. are examples of electromagnetic radiation.
Electromagnetic radiation has a dual nature, meaning it possesses the properties of both particles and waves. This phenomenon is called wave-particle duality.
In the wave-particle duality, electromagnetic radiation can be described as having both wave-like and particle-like properties. When considering the wave aspect, radiation is characterized by oscillating electric and magnetic fields that travel through space.
Key properties of waves include wavelength, frequency, and speed. Visible light and radio waves differ in their wavelengths and frequencies; visible light has shorter wavelengths and higher frequencies, while radio waves have longer wavelengths and lower frequencies.
On the other hand, the particle aspect of electromagnetic radiation is described by photons. Photons are discrete packets of energy that move through space, carrying the energy of electromagnetic radiation. The energy of a photon is directly proportional to its frequency and inversely proportional to its wavelength.
In summary, visible light and radio waves are both examples of electromagnetic radiation, which exhibits wave-particle duality. This means they possess the properties of both waves (characterized by wavelength, frequency, and speed) and particles (represented by photons). Understanding this dual nature is crucial for comprehending the behavior and interaction of electromagnetic radiation with matter.
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A 2200 kg truck uses a braking force of -13,000 N to stop in 5 seconds.
A. What impulse acts on the truck?
B. What is the trucks change in momentum?
C. What is the initial velocity of the truck?
Answers
C. The initial velocity of the truck is 29.55 m/s.
Given:
mass of truck (m) = 2200 kg
braking force (F) = -13,000 N (negative sign indicates force is opposite to motion)
time (t) = 5 seconds
A. To calculate the impulse acting on the truck, we can use the formula:
impulse (J) = force x time
J = F x t
J = -13,000 N x 5 s
J = -65,000 N.s (the unit for impulse is Newton seconds or N.s)
Therefore, the impulse acting on the truck is -65,000 N.s.
B. To calculate the change in momentum of the truck, we can use the formula:
change in momentum (Δp) = mass x velocity(final) - mass x velocity(initial)
Δp = m x (0) - m x v(initial)
where v(final) = 0, since the truck comes to a stop.
Δp = -m x v(initial)
Δp = -2200 kg x v(initial)
Δp = -2200v (the unit for momentum is kg.m/s)
Now, we can use the impulse-momentum theorem which states that impulse is equal to the change in momentum:
J = Δp
-65,000 N.s = -2200v
Solving for v:
v = 29.55 m/s (rounded to two decimal places)
Therefore, the change in momentum of the truck is -65,000 N.s, and the initial velocity of the truck is 29.55 m/s.
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A civil engineer is writing code to calculate the center of gravity for a semi-ellipse:
radius ← 33.27
centerY ← (4 radius) / 3 PI
The code relies on the built-in constant PI. After running the code, centerY stores 14.120226551112957.
Their colleague checks the result by running the same calculation on their own computer. Their program results in a centerY of 14.120226551112925.
The two values are very close, but not quite the same.
Which of these is the most likely explanation for the difference?
Pilihan jawaban
One of the computers experienced an integer overflow error when calculating the result.
The two computers executed the arithmetic operations using a different order of operations.
The two computers represent the constant PI with a different level of precision, due to their rounding strategy or size limitations.
One computer used an integer representation for the numbers while the other computer used the more accurate floating-point representation.
Answers
Due to their rounding methods or space restrictions, the two computers' representations of the constant PI have varying degrees of precision.
The value of PI is an irrational number that cannot be represented exactly with a finite number of digits. Therefore, different computers may use different levels of precision when representing PI due to their rounding strategies or limitations in the number of digits they can store. This can result in small differences in the calculated value of centerY, even though the same formula is used. The difference between the two values given in the question is very small and can be attributed to this level of imprecision in the representation of PI. The other options listed are less likely explanations for this particular scenario.
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5
Why are black holes important to study?
O A.
О в.
O C.
O D.
Because they are the most numerous of celestial bodies in our universe and are thought to be at the center of every solar system.
Because they defy the laws of the scientific method and have required scientists to create new techniques of inquiry.
Because they can tell us about the beginnings of our universe, as well as what we can expect in the future.
Because the earliest black holes spit out particles that became moons, which control tides of water and lead to generation of life.
Answers
C. Because they can tell us about the beginnings of our universe, as well as what we can expect in the future.
Black holes are important to study because they are some of the most extreme objects in the universe, and studying them can provide insight into the fundamental laws of physics. By studying black holes, scientists can better understand the nature of space, time, and gravity, and can test theories like general relativity. Additionally, black holes are thought to have played a key role in the formation and evolution of galaxies, so studying them can help us understand the structure and history of the universe.
6. CCC Cause and Effect Use the terms motion, power, and work to complete the table. Cause Energy transferred over time Force applied to an object to change its position Force moving an object over a distance Effect
Answers
Cause: Energy transferred over time Effect: Power When energy is transferred over time, it results in the generation of power. Power is the rate at which work is done or energy is transferred, per unit of time.
The more energy that is transferred over time, the greater the power generated. Cause: Force applied to an object to change its position. Effect: Motion
When a force is applied to an object, it causes the object to move. Motion is a change in an object's position over time. The greater the force applied to the object, the greater the acceleration produced, and the faster the object will move.
Cause: Force moving an object over a distance
Effect: Work
When a force moves an object over a distance, it results in the generation of work. Work is the energy transferred to or from an object when a force is applied over a distance. The more force that is applied over a distance, the more work is done.
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Cause:-Energy transferred over time,Force applied to an object to change its position,Force moving an object over a distance
Effect:Power,Work,Motion
The Explanation are given as follows :-
Power is the rate at which work is done, or the amount of energy transferred over time. When energy is transferred over time, it can be used to perform work at a certain rate, which is power.
Work is the energy transferred when a force is applied to an object to change its position. When a force is applied to an object, work is done to move the object over a certain distance.
Motion is the change in position of an object over time due to a force moving it over a certain distance. When a force is applied to an object and work is done to move it, the object undergoes motion.
Work, power, and energy are related concepts in physics, but they are different in terms of their definitions and units of measurement.
Work is the transfer of energy that occurs when a force is applied to an object and the object is moved through a distance. The amount of work done is equal to the force applied multiplied by the distance over which the force is applied. The unit of work is joules (J).
Power is the rate at which work is done or energy is transferred. It is equal to the amount of work done divided by the time taken to do the work. The unit of power is watts (W).
Energy is the capacity to do work, or the ability to cause change. It is a scalar quantity that comes in different forms, such as kinetic energy (energy of motion), potential energy (energy stored in an object due to its position or state), thermal energy (energy associated with the temperature of a system), etc. The unit of energy is also joules (J).
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a motoe is a device :(i) which converts mechanical energy into electrical energy(ii) which converts electrical energy into mechanical energy(iii) in which split-ring is usedselect the correct option.
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A machine that transforms electrical energy into mechanical energy is an electric motor. Its foundation is the idea that a current-carrying conductor receives a force when put in a magnetic field that is perpendicular to it.
A current-carrying wire put in a magnetic field senses a force and begins rotating; this is how electromagnetic induction operates. An electric motor's fundamental parts consist of a rotating shaft, a current-carrying conductor (such a wire), and a stationary magnetic field. Although it is not a compulsory part of a motor, the split-ring can be utilized in some models to change the motor's rotational axis.
Either permanent magnets or an electromagnet produce the magnetic field within an electric motor. By running an electric current through a coil of wire, which produces a magnetic field, an electromagnet is generated.
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which of the following is not an example of a remote sensing system? satellites radar lambert-conformal maps aerial photography global positioning system
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Global Positioning System (GPS) is not an example of a remote sensing system.
GPS is a navigation system that uses a network of satellites to determine the location and time information of an object or a person on Earth. It does not involve the acquisition of physical data or measurements of the Earth's surface or atmosphere, which is the main purpose of remote sensing systems.
In contrast, satellites, radar, Lambert-conformal maps, and aerial photography are all examples of remote sensing systems that are used to collect data and measurements of the Earth's surface and atmosphere from a distance.
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What did Orsted discover about electricity and magnetism?
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In 1820, Hans Christian Orsted discovered the relationship between electricity and magnetism, which is now known as electromagnetism.
how many electrons are involved in the electrochemical reaction of a nicad battery?
Answers
In the electrochemical reaction of a Nicad battery, two electrons are involved.
Nickel-cadmium (NiCad) batteries are rechargeable batteries that use nickel oxide hydroxide and metallic cadmium as electrodes. A nickel-cadmium battery is a kind of rechargeable battery that uses nickel oxide hydroxide and metallic cadmium as electrodes. Nickel-cadmium batteries are an older technology that has been largely replaced by other forms of rechargeable batteries due to their lower capacity and potential cadmium toxicity.When a NiCad battery is charging, a current is sent through the battery from a charger, which causes an electrochemical reaction in the battery. This current causes the electrons from the negative electrode (the cadmium) to flow towards the positive electrode (the nickel oxide), allowing for the storing of electrical energy. When the battery is discharged, the electrochemical reaction is reversed, and the stored electrical energy is released. This results in the electrons moving from the nickel oxide electrode back to the cadmium electrode, providing the energy to power a device or system.The electrochemical reaction in a NiCad battery involves the transfer of two electrons.
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Question 5 - Electromagnetic radiation is emitted with a frequency of 1.5 × 1012 Hz. What type of radiation is it?
Question 6- A buoy, floating at sea, is at rest when a wave reaches it. The buoy rises to its maximum height n times in 4 seconds. The wavelength of the buoy is measured to be 1. Which of the following is an expression for its wave speed?
Question 7-is the picture .
Answers
Answer:
Question 5: The frequency of 1.5 × 10^12 Hz corresponds to the range of electromagnetic radiation known as "infrared radiation
Question 6: The wave speed can be determined using the formula:
wave speed = wavelength / period
where period is the time it takes for one complete wave to pass a point.
In this case, the buoy rises to its maximum height n times in 4 seconds, so the period is:
period = 4 / n
Since the wavelength is given as 1, the wave speed can be expressed as:
wave speed = 1 / (4/n) = n/4
Therefore, the correct expression for the wave speed of the buoy is:
N/4
Question 7: The wavelength, λ, is the distance between two consecutive crests or troughs, which is given as 20 m in this case. The vertical distance between a crest and a trough is twice the amplitude, so the amplitude, A, is:
A = 4.0 m / 2 = 2.0 m
The time it takes for one wave to pass the boat, the period, T, is given by:
T = 2.0 s
The wave speed, v, can be calculated from the formula:
v = λ / T
Substituting the values, we get:
v = 20 m / 2.0 s = 10 m/s
Therefore, the speed of the waves is 10 m/s and the amplitude is 2.0 m.
Explanation:
Hope It Is Understandable.
Electromagnetic radiation is emitted with a frequency of 1.5 × 10¹² Hz. it is visible type of radiation.
A buoy, floating at sea, is at rest when a wave reaches it. The buoy rises to its maximum height n times in 4 seconds. The wavelength of the buoy is measured to be 1.an expression for its wave speed is v = n/4.
What is Radiation ?
Radiation refers to the transfer of energy in the form of electromagnetic waves or subatomic particles. These waves or particles carry energy from a source to a receiver through space or a medium. Radiation is a natural process that occurs in various forms in our environment, such as sunlight, cosmic rays, and radioactive decay of materials. However, radiation can also be produced artificially by various means, such as X-ray machines, nuclear reactors, and weapons.
Radiation has many applications in medicine, industry, and technology. For example, X-rays are used for diagnostic imaging in medicine, while radiation is used to sterilize medical equipment and preserve food. In the industrial sector, radiation is used to detect defects in materials and welds. It is also used to produce electricity in nuclear power plants.
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. a 30 newton stone is dropped from a height of 10 m and strikes the ground with a speed of 13 m/s. what average force of air friction acted on the stone as it fell?
Answers
The average force of air friction that acted on the stone as it fell is 8.72 N.
The resistance experienced by an object when passing through the air is known as air friction. The force of air resistance is proportional to the speed of the object moving through the air. The faster an object travels, the greater the resistance it experiences. It can be computed using the following formula:
F = 1/2pv²CdA,
Where F is the force of air resistance, p is the density of the air, v is the velocity of the object, Cd is the drag coefficient, and A is the surface area of the object.
The formula for gravitational potential energy is:
PE = mgh
where m is the mass of the object, g is the acceleration due to gravity (9.8 m/s²), h is the height the object was dropped from
Let us determine the velocity of the object upon impact. The formula for finding the velocity of an object that falls from a height is:
v² = u² + 2gh
where v is the final velocity, u is the initial velocity (which is zero in this case), g is the acceleration due to gravity (9.8 m/s²), h is the height the object was dropped from
Substitute the values into the formula:
v² = 0 + 2(9.8)(10)
v² = 196
v = √196
v = 14 m/s
Therefore, the final velocity of the object is 14 m/s.
Let us now calculate the force of air resistance using the formula:
F = 1/2pv²CdA
where F is the force of air resistance, p is the density of the air (1.2 kg/m³ at sea level), v is the velocity of the object (14 m/s), Cd is the drag coefficient (for a sphere it is 0.47), A is the surface area of the object (for a sphere it is πr²)
Substitute the values into the formula:
F = 1/2 × 1.2 × 14² × 0.47 × π(0.5²)
F = 8.72 N
Therefore, the average force of air friction that acted on the stone as it fell is 8.72 N.
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In recent years, assistive technologies have been developed to give people with disabilities access to resources. Examples include wheelchair ramps, voice recognition software, and screen readers. Which statement best explains how government regulations guided the development of these technologies?
A. After laws were enacted to mandate equal access for people with disabilities, consumers began to demand that all businesses provide assistive technologies.
B. As the public need for equal access for people with disabilities became understood, laws were enacted to mandate assistive technologies' inclusion in almost all public spaces.
C. Engineers recognized the lack of equal access and decided to put pressure on the government to enact laws mandating the use of assistive technologies.
D. As businesses became aware of the demand for assistive technologies, they requested money from the government to help with research and development.
Answers
The statement that best explains how government regulations guided the development of assistive technologies for people with disabilities is B
What is Disability?
Disability is a term used to describe a physical, mental, or sensory impairment that can affect a person's ability to perform daily activities or participate fully in society. Disabilities can be either visible or invisible, and they can range in severity from mild to severe. Examples of disabilities include mobility impairments, visual impairments, hearing impairments, intellectual disabilities, and mental health conditions.
The development of assistive technologies for people with disabilities was guided by government regulations aimed at ensuring equal access to resources and public spaces. These regulations were enacted as a response to the public need for equal access and were not primarily driven by consumer demand or pressure from engineers.
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A Styrofoam plate with a negative charge of -4.16x10 C is placed near an aluminum dish which has been charged positively by
induction to a charge of +8.85x10C. The centers of positive and negative charge are positioned 2.22 cm apart. Make the
assumption that the two objects act as point charges and determine the magnitude of the force of attraction between the Styrofoam
plate and the aluminum dish.
Answers
The magnitude of the force of attraction between the Styrofoam plate and the aluminum dish is [tex]5.15 * 10^-7 N[/tex].
We can use Coulomb's law to calculate the magnitude of the force of attraction between the Styrofoam plate and the aluminum dish. Coulomb's law states that the force between two point charges is proportional to the product of the charges and inversely proportional to the square of the distance between them:
[tex]F = k * (q1 * q2) / d^2[/tex]
where F is the force, k is Coulomb's constant [tex](9 x 10^9 N*m^2/C^2)[/tex], q1 and q2 are the charges of the two objects, and d is the distance between the centers of the objects.
Substituting the given values, we get:
[tex]F = (9 x 10^9 N*m^2/C^2) * ((-4.16 x 10^-10 C) * (8.85 x 10^-10 C)) / (0.0222 m)^2[/tex]
[tex]F = -5.15 x 10^-7 N[/tex]
The negative sign indicates that the force of attraction is attractive, which means that the Styrofoam plate and the aluminum dish are attracted to each other. Therefore, the magnitude of the force of attraction between the Styrofoam plate and the aluminum dish is[tex]5.15 x 10^-7 N.[/tex]
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the smallest single current-carrying conductor cable permitted to be installed in cable tray in an industrial establishment is ? .
Answers
The smallest single current-carrying conductor cable permitted to be installed in cable tray in an industrial establishment is 14 AWG. This is a standard gauge size for electrical cables which refers to the diameter of the individual wire strands of the cable.
It is important to use the correct size cable for the intended purpose, as this ensures that the cable can safely carry the required current without overheating and becoming a hazard. Using a cable that is too small for the current load being carried can cause the cable to heat up, leading to a potential fire hazard.
Using a cable that is too large can be an unnecessary expense, as it may not be necessary to use a heavier gauge cable. 14 AWG is the smallest cable size used in an industrial setting and is suitable for applications with low current requirements.
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If the theoretical yield of a reaction is 100 grams, which value for actual yield is physically impossible? Select the correct answer below: A.0 grams B.50 grams C.99.9 grams D.110 grams
Answers
The physically impossible value for the actual yield, in this case, is D. 110 grams. This is because the actual yield cannot exceed the theoretical yield of 100 grams for a reaction.
The theoretical yield is the maximum amount of product that can be formed based on the amount of limiting reactant present in a reaction. It is calculated using stoichiometry, which involves the use of mole ratios between the reactants and products in a chemical reaction. It is the yield calculated from the balanced chemical equation that is determined using stoichiometry.
The actual yield is the amount of product actually obtained from a chemical reaction. It is obtained experimentally by performing the reaction in the lab and measuring the amount of product obtained. It is always lower than the theoretical yield because of the limitations of the reaction, such as incomplete reactions, side reactions, and loss of product due to handling or impurities.
The relationship between theoretical yield and actual yield is given by the percent yield. It is calculated as the ratio of actual yield to theoretical yield, multiplied by 100. The percent yield is a measure of the efficiency of the reaction and is always less than 100%. It is physically impossible for the actual yield to be greater than the theoretical yield because the theoretical yield is the maximum amount of product that can be formed in a reaction. Therefore, the correct answer is D. 110 grams.
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Two wires are made of the same material andhave the same length but different radii. Theyare joined end-to-end and a potentialdifference is maintained across thecombination, which of the following quantitythat is the same for both wires isA. potential differenceB. electric currentС. current densityD. electric field
Answers
Two wires are made of the same material and have the same length but different radii. They are joined end-to-end and a potential difference is maintained across the combination, and the following quantity that is the same for both wires is the electric current.
What is an electric current?
Electric current refers to the movement of electric charge that is carried by moving electrons in a wire or an electric circuit. It is measured in amperes (A) and is a basic component of the study of electricity.
The current density is the current per unit of cross-sectional area of the material through which the current flows. It is represented by the symbol J and is given in amperes per meter squared (A/m²).
The electric field is the force per unit charge that a charged particle would experience when placed in the field. It is represented by the symbol E and is given in volts per meter (V/m).
Finally, the potential difference is defined as the difference in electric potential energy per unit of charge between two points in a circuit. It is also called voltage and is represented by the symbol V. It is measured in volts (V).
Based on the information given, both wires are of the same material and length, but their radii are different. This indicates that the wires' cross-sectional areas are not the same, which implies that their current densities would differ. Because the potential difference is the same across the wires, it must be the electric current that is identical in both wires. Thus, the right option is B, electric current.
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in a purely inductive circuit (reactance only, no resistance) a phase shift of 90 degrees results in a pf of ?
Answers
In a purely inductive circuit (reactance only, no resistance), a phase shift of 90 degrees results in a power factor (pf) of 0.Inductive circuits:An inductor is a component of an electric circuit that opposes changes in current flow. An inductor stores energy in a magnetic field created by the current passing through it.
As a result, inductive circuits delay the current in relation to the voltage. As a result, the phase angle between the voltage and the current in an inductive circuit is said to be lagging or negative.If the phase angle between voltage and current is 90 degrees, the power factor (pf) is zero.
This means that the circuit's power flow is entirely reactive, with no actual power being delivered. Reactive power is energy that oscillates between the source and the load and is never converted to a usable form, such as heat or mechanical work. The apparent power of the circuit is equal to the reactive power. The apparent power is expressed as S = VI, where S is apparent power, V is voltage, and I is current.
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a particle is trapped in an infinite one-dimensional well of width l. if the particle is in its ground state, evaluate the probability to find the particle in the: (a) left (b) middle (c) right third (l/3) of the well.
Answers
(a) The probability of finding the particle in the left third of the well is 0.25.
(b) The probability of finding the particle in the middle third of the well is 0.5.
(c) The probability of finding the particle in the right third of the well is 0.25.
How to calculate the probability?
The probability of finding the particle in the left (a), middle (b), or right (c) third of the well can be evaluated using the wave function of the particle in its ground state. The wavefunction of a particle in its ground state in an infinite one-dimensional well of width l is given by:
ψ0(x) = (2/l)1/2sin(πx/l)
The probability of finding the particle in a given range is given by:
P(x1 < x < x2) = ∫x1x2 ψ0(x)2dx
Substituting x1 = 0, x2 = l/3, we find that the probability of finding the particle in the left third of the well is:
P(0 < x < l/3) = (2/l)2 [ -cos(πl/3) + cos(0) ]
P(0 < x < l/3) = (2/l)2 (1 - cos(πl/3))
P(2l/3 < x < l) = 0.25
Similarly, the probability of finding the particle in the middle third of the well is:
P(l/3 < x < 2l/3) = (2/l)2 [ -cos(2πl/3) + cos(πl/3) ]
P(l/3 < x < 2l/3) = (2/l)2 [2sin2(πl/6)]
P(l/3 < x < 2l/3) = 0.5
Finally, the probability of finding the particle in the right third of the well is:
P(2l/3 < x < l) = (2/l)2 [ -cos(πl) + cos(2πl/3) ]
P(2l/3 < x < l) = (2/l)2 [1 + cos(πl/3)]
P(2l/3 < x < l) = 0.25
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The north and the west and the south are good hunting ground, but it is forbidden to go east. it is forbidden to go to any of the dead places except to search for metal and then he who touches the metal must be a priest or the son of a priest. afterwards, both the man and the metal must be purified. these are the rules and the laws; they are well made. it is forbidden to cross the great river and look upon the place that was the place of the godsâ€"this is most strictly forbidden. we do not even say its name though we know its name. it is there that spirits live, and demonsâ€"it is there that there are the ashes of the great burning. these things are forbiddenâ€"they have been forbidden since the beginning of time. â€"“by the waters of babylon,†stephen vincent benét which details reveal the setting of the passage? check all that apply. “the north and the west . . . are good hunting ground†“it is forbidden to go east†“they are well made†“the son of a priest†“it is there that there are the ashes of the great burningâ€
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The phrases "the north and the west... are good hunting grounds," "it is forbidden to go east," and "there are the ashes of the Great Burning" reveal the setting of the passage.
John's travel to New York City is described in the Stephen Vincent Benét short fiction "By the Rivers of Babylon." In a post-apocalyptic future, John is a priest and the son of a priest. His people refer to New York City as the "Land of the Gods". The planet and the people who still live in it have regressed to a primitive, superstitious state following the Great Burning, which was subsequently proven to have been caused by some type of bomb or another weapon of mass devastation.
They think that metal is cursed and that the former inhabitants of this planet were gods. The details in this particular text that seem to indicate the setting are as follows, it is banned to travel east, where there are the ashes from the Great Burning, while the north and west are good hunting grounds.
In the end, John travels to the east, crosses the Hudson, and arrives in New York. He finally understands that the gods were actually people and that their own destruction was a result of their own selfishness.
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If a gas at 25 °c occupies 3.6 L at a pressure of 1 atm. what would be its volume at a pressure of 2.5 atm.
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To solve this problem, we can use the combined gas law, which relates the pressure, volume, and temperature of a gas. The combined gas law states:
(P1 × V1) ÷ T1 = (P2 × V2) ÷ T2
where:
P1 = initial pressure
V1 = initial volume
T1 = initial temperature
P2 = final pressure
V2 = final volume
T2 = final temperature
We can use this formula to find the final volume V2 of the gas at a pressure of 2.5 atm:
(P1 × V1) ÷ T1 = (P2 × V2) ÷ T2
We are given:
P1 = 1 atm
V1 = 3.6 L
T1 = 25 °C = 298 K (we need to convert Celsius to Kelvin by adding 273.15)
P2 = 2.5 atm
T2 = T1 (assuming the temperature remains constant)
Substituting these values into the formula, we get:
(1 atm × 3.6 L) ÷ 298 K = (2.5 atm × V2) ÷ 298 K
Simplifying and solving for V2, we get:
V2 = (1 atm × 3.6 L × 298 K) ÷ (2.5 atm × 298 K)
V2 = 1.296 L
Therefore, the volume of the gas at a pressure of 2.5 atm would be 1.296 L.
Try It: Electricity and Magnetism
What causes an object to become magnetized? (Select ALL that apply)
domains all line up
domains are randomized
proton movement
electron movement
Answers
The correct options are:
Domains all line up
Domains are randomized
Electron movement
When a material is magnetized, its domains become aligned in the same direction, which creates a magnetic field. If the domains are randomized, there is no net magnetic field. The alignment of domains can be affected by external magnetic fields, heating, or other factors. Electrons play a crucial role in magnetism because their movement generates magnetic fields. Proton movement does not contribute significantly to magnetism.
a diver jumps off a diving platform. which of the following does not explain why the diver accelerates as they fall? i. the momentum of the earth/diver system is conserved ii. there is a downwards gravitational force on the diver
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The diver accelerates as they fall because ii. there is a downwards gravitational force on the diver.
Gravitational force is responsible for the acceleration experienced by the diver during the fall. When a diver jumps off a diving platform, he falls down, this fall or descent is due to gravity. Gravity, which is the force that attracts two bodies towards each other, causes the diver to accelerate as he falls. The rate of acceleration is determined by the amount of gravitational force that the diver experiences. The more the gravitational force, the faster the diver will fall.
Since the earth has more mass than the diver, the gravitational force acting on the diver is greater than the force that the diver exerts on the earth as he falls, this causes the acceleration of the diver. The momentum of the earth/diver system is conserved, which means that the total momentum of the system remains constant. The momentum of the earth is such that it moves at a much slower rate than the diver, so it doesn't affect the acceleration of the diver. As a result, this fact does not explain why the diver accelerates as he falls. Thus, the answer is i. The momentum of the earth/diver system is conserved.
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Help the picture is the question I need help with thanks
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The formula for conservation of momentum is p = m₁*v₁ + m₂*v₂, so if m₁*v₁ = 0 (i.e., the first car is at rest), then p = m₂*v₂. So, v₂ = p/m₂ = (758*17 + 1399*0)/1399 = 11.63 m/s.
What is momentum?
Momentum is a concept in physics that describes the motion of an object and the effect that this motion has on its surroundings. It is the product of an object's mass and velocity, and it is conserved, meaning that the total momentum of a system remains constant unless an external force acts upon it. Momentum can be transferred from one object to another and can be used to explain why a force is required to change the motion of an object that has momentum. In everyday life, momentum plays an important role in sports and other activities, allowing objects to move in a desired direction with force.
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to which two faces of the block should the potential difference be applied to give the maximum current density?
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The two faces of the block to which the potential difference should be applied to give the maximum current density are those parallel to the applied electric field.
Current density is the current per unit area of a surface, expressed in amperes per square meter (A/m²). It is represented by the symbol J. When a current flows through a conductor or a wire, it is normally distributed across the cross-sectional area of the wire, and current density describes this distribution.Potential difference:Potential difference is the difference in electric potential energy between two points in an electrical circuit, which is usually represented by the symbol V.
It can be defined as the difference in electric potential energy per unit of charge between two points. The difference between two points is the amount of work that must be done to move a unit charge from one point to the other.The formula for the electric potential difference is:
V = IR
Where, V is the potential difference, I is the current, R is the resistance. To obtain the maximum current density, potential difference should be applied to the two faces of the block parallel to the applied electric field.
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A 12 V battery charger is used to re charge an electric lawnmower
Answers
Make sure the charger you're using is the right one. After 1980, 12-volt batteries were used in the majority of lawn tractors. Make sure a 12-volt charger is connected if your mower has one.
What purposes serve batteries?
Similar equipment, such as batteries, can accept, store, & release electricity as needed. Along with many other common energy sources, batteries store energy through chemistry in the shape of chemical potential.
How do you refer to a AAA battery?
Triple-A or AAA batteries
The term "battery" refers to a dry cell battery of a common size. Low-drain portable electronic gadgets frequently utilize one or more AAA batteries. In accordance with ANSI C18 and IEC R03, a zinc-carbon battery of this size is known.
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