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Questions and Answers
A spacecraft is traveling through deep space, far from any gravitational or frictional forces. If the spacecraft's engines suddenly stop, what will happen to its motion, according to Newton's laws?
A spacecraft is traveling through deep space, far from any gravitational or frictional forces. If the spacecraft's engines suddenly stop, what will happen to its motion, according to Newton's laws?
- It will gradually slow down and eventually come to a complete stop due to the absence of external forces.
- It will begin to accelerate in a random direction.
- It will continue moving at a constant velocity in the same direction indefinitely, until acted upon by an external force. (correct)
- It will immediately stop moving due to the lack of propulsion.
A thermodynamic system undergoes a process in which its internal energy decreases by 500 J. At the same time, the system performs 200 J of work on its surroundings. According to the first law of thermodynamics, how much heat is transferred during this process, and in which direction?
A thermodynamic system undergoes a process in which its internal energy decreases by 500 J. At the same time, the system performs 200 J of work on its surroundings. According to the first law of thermodynamics, how much heat is transferred during this process, and in which direction?
- 700 J of heat is added to the system.
- 300 J of heat is added to the system.
- 700 J of heat is removed from the system.
- 300 J of heat is removed from the system. (correct)
Two parallel wires are carrying electric currents in opposite directions. What is the nature of the magnetic force between the wires?
Two parallel wires are carrying electric currents in opposite directions. What is the nature of the magnetic force between the wires?
- The force will depend on the voltage applied.
- The wires will repel each other. (correct)
- There is no magnetic force between the wires.
- The wires will attract each other.
Monochromatic light is incident on a double-slit apparatus, creating an interference pattern on a screen behind the slits. If the distance between the slits is decreased, what will happen to the spacing between the bright fringes in the interference pattern?
Monochromatic light is incident on a double-slit apparatus, creating an interference pattern on a screen behind the slits. If the distance between the slits is decreased, what will happen to the spacing between the bright fringes in the interference pattern?
An electron is confined within an infinitely deep potential well of width L. According to quantum mechanics, what is the lowest possible energy that the electron can possess?
An electron is confined within an infinitely deep potential well of width L. According to quantum mechanics, what is the lowest possible energy that the electron can possess?
A car accelerates uniformly from rest to a speed of 20 m/s in 5 seconds. What is the magnitude of the car's average acceleration?
A car accelerates uniformly from rest to a speed of 20 m/s in 5 seconds. What is the magnitude of the car's average acceleration?
A heat engine operates between a hot reservoir at 500 K and a cold reservoir at 300 K. What is the maximum possible efficiency of this engine?
A heat engine operates between a hot reservoir at 500 K and a cold reservoir at 300 K. What is the maximum possible efficiency of this engine?
A proton is moving with a velocity v perpendicular to a uniform magnetic field B. What is the path of the proton?
A proton is moving with a velocity v perpendicular to a uniform magnetic field B. What is the path of the proton?
Light travels from air into glass. Which of the following properties of light change as it enters the glass?
Light travels from air into glass. Which of the following properties of light change as it enters the glass?
What is the fundamental concept introduced by quantum mechanics that distinguishes it from classical physics in describing the behavior of particles?
What is the fundamental concept introduced by quantum mechanics that distinguishes it from classical physics in describing the behavior of particles?
Flashcards
Displacement:
Displacement:
Change in position of an object.
Velocity:
Velocity:
Rate of change of displacement.
Acceleration:
Acceleration:
Rate of change of velocity.
Force:
Force:
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Newton's First Law (Law of Inertia):
Newton's First Law (Law of Inertia):
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Newton's Second Law:
Newton's Second Law:
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Newton's Third Law:
Newton's Third Law:
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Momentum:
Momentum:
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Impulse:
Impulse:
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Energy:
Energy:
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Study Notes
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