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Physics > Theoretical physics > Flashcards

Theoretical physics Flashcards

1
Q

What is the basic unit of force in the International System of Units (SI)?

A

Newton

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2
Q

True or False: Energy can be created and destroyed.

A

False

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3
Q

Fill in the blank: The formula for kinetic energy is ______.

A

1/2 mv^2

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4
Q

What is the speed of light in a vacuum?

A

Approximately 299,792,458 meters per second

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5
Q

Which law states that an object in motion stays in motion unless acted upon by an external force?

A

Newton’s First Law of Motion

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6
Q

What is the principle that states that the total energy in a closed system remains constant?

A

Conservation of Energy

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7
Q

True or False: Mass and weight are the same thing.

A

False

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8
Q

In which direction does gravity act?

A

Towards the center of the Earth

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9
Q

What is the formula for calculating gravitational force between two masses?

A

F = G(m1*m2)/r^2

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10
Q

What is the term for the rate of change of velocity?

A

Acceleration

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11
Q

What is the unit of energy in the SI system?

A

Joule

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12
Q

Fill in the blank: The law of universal gravitation was formulated by ______.

A

Isaac Newton

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13
Q

What is the term for the force that opposes the motion of an object through a fluid?

A

Drag

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14
Q

What is the principle that explains how pressure decreases as the speed of a fluid increases?

A

Bernoulli’s Principle

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15
Q

True or False: All electromagnetic waves travel at the same speed in a vacuum.

A

True

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16
Q

What is the term for the change in frequency of a wave in relation to an observer who is moving relative to the wave source?

A

Doppler Effect

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17
Q

What is the primary force that holds atomic nuclei together?

A

Strong nuclear force

18
Q

Fill in the blank: The energy stored in a compressed spring is an example of ______ energy.

A

Potential

19
Q

What is the formula for calculating work done?

A

W = Fd cos(θ)

20
Q

What is the term for the resistance of an object to changes in its motion?

A

Inertia

21
Q

What is the metric unit of pressure?

A

Pascal

22
Q

True or False: Light can behave both as a wave and as a particle.

A

True

23
Q

What is the term for the distance between two successive peaks of a wave?

A

Wavelength

24
Q

What is the principle that describes the relationship between current, voltage, and resistance in an electrical circuit?

A

Ohm’s Law

25
Q

Fill in the blank: The device used to measure electric current is called an ______.

A

Ammeter

26
Q

What is the term for the energy required to raise the temperature of 1 kilogram of a substance by 1 degree Celsius?

A

Specific heat capacity

27
Q

What is the formula for calculating the momentum of an object?

A

p = mv

28
Q

True or False: A photon has mass.

A

False

29
Q

What is the phenomenon called when light bends as it passes from one medium to another?

A

Refraction

30
Q

What is the unit of frequency?

A

Hertz

31
Q

Fill in the blank: The total momentum before an interaction is equal to the total momentum after the interaction, according to the law of ______.

A

Conservation of Momentum

32
Q

What is the term for the energy associated with an object’s position or configuration?

A

Potential energy

33
Q

True or False: In a vacuum, heavier objects fall faster than lighter objects.

A

False

34
Q

What is the formula for calculating the frequency of a wave?

A

f = v/λ

35
Q

What is the force that opposes the motion of an object in contact with a surface?

A

Friction

36
Q

Fill in the blank: The bending of light around an obstacle is known as ______.

A

Diffraction

37
Q

What is the term for the measure of the average kinetic energy of particles in a substance?

A

Temperature

38
Q

True or False: A black hole has a gravitational pull strong enough to prevent light from escaping.

A

True

39
Q

What is the term for the smallest unit of an element that retains its chemical properties?

A

Atom

40
Q

What is the principle that states that for every action, there is an equal and opposite reaction?

A

Newton’s Third Law of Motion

41
Q

Fill in the blank: The study of motion and the forces that affect it is called ______.

A

Kinematics

42
Q

What is the term for a wave that requires a medium to travel through?

A

Mechanical wave

Physics (12 decks)

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