Physics concepts

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Questions and Answers

Which of the following scenarios best illustrates Newton's third law of motion?

  • A book rests on a table and remains stationary.
  • A car accelerates forward due to the engine's force.
  • A ball rolls down a slope, increasing in speed.
  • A rocket propels upward by ejecting exhaust gases downward. (correct)

A closed system undergoes an adiabatic process. Which statement accurately describes what happens to the system?

  • No heat is exchanged between the system and its surroundings. (correct)
  • The pressure of the system remains constant.
  • The internal energy of the system remains constant.
  • The temperature of the system remains constant.

Consider two negatively charged objects. If the distance between them is halved, how does the electrostatic force change, according to Coulomb's Law?

  • It is halved.
  • It quadruples. (correct)
  • It doubles.
  • It is reduced to one-quarter of its original value.

In a double-slit experiment, what phenomenon causes the observed pattern of bright and dark fringes?

<p>Interference (C)</p> Signup and view all the answers

According to the Heisenberg uncertainty principle, which pair of quantities cannot be known with perfect accuracy simultaneously?

<p>Position and momentum (C)</p> Signup and view all the answers

What is the primary implication of time dilation in Einstein's theory of special relativity?

<p>Time passes slower for objects moving at high speeds relative to a stationary observer. (A)</p> Signup and view all the answers

In nuclear physics, what force is responsible for holding protons and neutrons together within the atomic nucleus?

<p>Strong nuclear force (A)</p> Signup and view all the answers

Which branch of physics is most directly concerned with the study of sound and its properties?

<p>Acoustics (C)</p> Signup and view all the answers

If the velocity of an object is doubled, how does its momentum change?

<p>It doubles. (A)</p> Signup and view all the answers

Which of the following best describes the concept of 'work' in physics?

<p>The energy transferred to or from an object by a force. (B)</p> Signup and view all the answers

Flashcards

What is Physics?

Study of matter, energy, space, and time and how they behave.

Classical Mechanics

Deals with the motion of macroscopic objects based on Newton's laws.

Newton's First Law

Object at rest stays at rest, object in motion stays in motion unless acted on by force.

Newton's Second Law

Force equals mass times acceleration: F = ma

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Newton's Third Law

For every action, there is an equal and opposite reaction.

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Thermodynamics

Deals with heat, work, energy, and their relationships.

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Second Law of Thermodynamics

The entropy of an isolated system always increases (or remains constant).

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Electromagnetism

Study of interactions between electric charges and magnetic fields.

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Faraday's Law

Changing magnetic field induces an electromotive force (EMF).

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Optics

Study of light and its behavior.

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