Physics Fundamentals

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Questions and Answers

What is the primary focus of physics as a natural science?

  • The study of living organisms and their processes.
  • The study of the Earth's physical structure and substance.
  • The study of chemical reactions and compounds.
  • The study of matter, energy, and their interactions. (correct)

Which branch of physics deals with the motion of macroscopic objects under the influence of forces?

  • Electromagnetism
  • Classical Mechanics (correct)
  • Optics
  • Thermodynamics

What does thermodynamics primarily study?

  • The structure of atoms.
  • The behavior of light.
  • Heat, work, and energy, and the relationships between them. (correct)
  • The motion of objects at high speeds.

Which of the following phenomena is NOT a part of the study of optics?

<p>Radioactivity (A)</p>
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Which field of physics studies matter at the atomic and subatomic levels?

<p>Quantum mechanics (A)</p>
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What does kinematics describe?

<p>Motion without considering its causes. (A)</p>
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According to Newton's first law of motion, what happens to an object when no force acts upon it?

<p>It remains at rest or in uniform motion. (A)</p>
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What is the formula for calculating work when a force is applied to an object?

<p>$W = Fd\cos\theta$ (A)</p>
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Which of the following describes kinetic energy?

<p>Energy of motion (C)</p>
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What is power defined as?

<p>The rate at which work is done. (B)</p>
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What does temperature measure in thermodynamics?

<p>The average kinetic energy of the particles in a substance. (C)</p>
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What is heat?

<p>The transfer of thermal energy between objects at different temperatures. (C)</p>
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What does the first law of thermodynamics state?

<p>Energy is conserved. (B)</p>
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What is electric charge measured in?

<p>Coulombs (C)</p>
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What is electric current?

<p>The rate of flow of electric charge. (C)</p>
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What is the relationship described by Ohm's Law?

<p>Voltage equals current times resistance. (D)</p>
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What happens to light when it reflects off a surface?

<p>It bounces off. (C)</p>
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What is refraction?

<p>The bending of light as it passes from one medium to another. (D)</p>
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What is wave-particle duality?

<p>The concept that particles exhibit wave-like properties and waves can exhibit particle-like properties. (C)</p>
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What does the theory of special relativity primarily deal with?

<p>The relationship between space and time for objects moving at constant velocities. (D)</p>
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Flashcards

What is Physics?

Study of matter, energy, space, and time.

What is Classical Mechanics?

Motion of macroscopic objects under forces.

What is Thermodynamics?

Studies heat, work, and energy relationships.

What is Electromagnetism?

Interaction of electric charges and magnetic moments.

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What is Optics?

Study of light and its behavior.

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What is Quantum Mechanics?

Behavior of matter at atomic level.

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What is Relativity?

Deals with space, time, and gravity.

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What is Kinematics?

Motion without considering causes.

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What is Dynamics?

Motion considering the forces that cause it.

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What is Moment of Inertia?

Tendency to resist changes in rotational motion.

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What is Temperature?

Measure of average particle kinetic energy.

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What is Heat?

Energy transfer due to temperature difference.

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What is Ohm's Law?

Voltage equals current times resistance.

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What is Electric Field?

Force per unit charge.

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What is Electric Potential?

Potential energy per unit charge.

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What is Refraction?

Light bending when entering new medium.

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Wave-Particle Duality?

Particles act like waves, vice versa.

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Uncertainty Principle?

Position & momentum limits to precision.

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Mass-Energy Equivalence?

E = mc^2 : mass and energy relationship.

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What is Time Dilation?

Moving clocks tick slower

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Study Notes

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