Theoretical physics

Question 1

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

Answer 1

Newton

Question 2

True or False: Energy can be created and destroyed.

Answer 2

False

Question 3

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

Answer 3

1/2 mv^2

Question 4

What is the speed of light in a vacuum?

Answer 4

Approximately 299,792,458 meters per second

Question 5

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

Answer 5

Newton’s First Law of Motion

Question 6

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

Answer 6

Conservation of Energy

Question 7

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

Answer 7

False

Question 8

In which direction does gravity act?

Answer 8

Towards the center of the Earth

Question 9

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

Answer 9

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

Question 10

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

Answer 10

Acceleration

Question 11

What is the unit of energy in the SI system?

Answer 11

Joule

Question 12

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

Answer 12

Isaac Newton

Question 13

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

Answer 13

Drag

Question 14

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

Answer 14

Bernoulli’s Principle

Question 15

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

Answer 15

True

Question 16

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?

Answer 16

Doppler Effect

Question 17

What is the primary force that holds atomic nuclei together?

Answer 17

Strong nuclear force

Question 18

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

Answer 18

Potential

Question 19

What is the formula for calculating work done?

Answer 19

W = Fd cos(θ)

Question 20

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

Answer 20

Inertia

Question 21

What is the metric unit of pressure?

Answer 21

Pascal

Question 22

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

Answer 22

True

Question 23

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

Answer 23

Wavelength

Question 24

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

Answer 24

Ohm’s Law

Question 25

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

Answer 25

Ammeter

Question 26

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

Answer 26

Specific heat capacity

Question 27

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

Answer 27

p = mv

Question 28

True or False: A photon has mass.

Answer 28

False

Question 29

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

Answer 29

Refraction

Question 30

What is the unit of frequency?

Answer 30

Hertz

Question 31

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

Answer 31

Conservation of Momentum

Question 32

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

Answer 32

Potential energy

Question 33

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

Answer 33

False

Question 34

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

Answer 34

f = v/λ

Question 35

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

Answer 35

Friction

Question 36

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

Answer 36

Diffraction

Question 37

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

Answer 37

Temperature

Question 38

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

Answer 38

True

Question 39

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

Answer 39

Atom

Question 40

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

Answer 40

Newton's Third Law of Motion

Question 41

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

Answer 41

Kinematics

Question 42

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

Answer 42

Mechanical wave