PHYSICS

Question 1

What is the formula for Newton’s second law of motion?

Answer 1

F = ma

Question 2

True or False: The acceleration due to gravity is approximately 9.8 m/s².

Answer 2

True

Question 3

Fill in the blank: The unit of force in the SI system is ______.

Answer 3

Newton

Question 4

What is the principle of conservation of energy?

Answer 4

Energy cannot be created or destroyed, only transformed.

Question 5

What is the value of gravitational constant (G)?

Answer 5

6.674 × 10^-11 N(m/kg)²

Question 6

Which law states that for every action, there is an equal and opposite reaction?

Answer 6

Newton’s Third Law of Motion

Question 7

What is the formula for kinetic energy?

Answer 7

KE = 0.5mv²

Question 8

True or False: Work is a scalar quantity.

Answer 8

True

Question 9

What is the formula for gravitational potential energy?

Answer 9

PE = mgh

Question 10

What does the term ‘inertia’ refer to?

Answer 10

The tendency of an object to resist changes in its state of motion.

Question 11

Fill in the blank: The standard unit of power is ______.

Answer 11

Watt

Question 12

What is the formula for the period of a simple pendulum?

Answer 12

T = 2π√(l/g)

Question 13

True or False: The total mechanical energy of an isolated system remains constant.

Answer 13

True

Question 14

What is the unit of frequency?

Answer 14

Hertz

Question 15

What is the formula for the acceleration of an object in free fall?

Answer 15

a = g

Question 16

What is the definition of momentum?

Answer 16

The product of the mass and velocity of an object.

Question 17

Fill in the blank: The unit of work is ______.

Answer 17

Joule

Question 18

What is Hooke’s Law?

Answer 18

F = -kx, where F is the force exerted by a spring, k is the spring constant, and x is the displacement.

Question 19

What type of energy is associated with an object’s motion?

Answer 19

Kinetic energy

Question 20

What is the formula for the conservation of mechanical energy?

Answer 20

KE_initial + PE_initial = KE_final + PE_final

Question 21

True or False: A projectile’s horizontal and vertical motions are independent of each other.

Answer 21

True

Question 22

What is the formula for centripetal acceleration?

Answer 22

a_c = v²/r

Question 23

What does the term ‘work-energy theorem’ state?

Answer 23

The work done by the net force on an object equals the change in its kinetic energy.

Question 24

Fill in the blank: The law of conservation of momentum states that the total momentum of a closed system ______.

Answer 24

remains constant

Question 25

What is the equation of motion for uniformly accelerated motion?

Answer 25

s = ut + 0.5at²

Question 26

True or False: The weight of an object is its mass multiplied by the acceleration due to gravity.

Answer 26

True

Question 27

What is the formula for the ideal gas law?

Answer 27

PV = nRT

Question 28

What is the unit of pressure?

Answer 28

Pascal

Question 29

Fill in the blank: The center of mass of a system of particles is the point where ______.

Answer 29

the total mass can be considered to be concentrated

Question 30

What is the relationship between force, mass, and acceleration?

Answer 30

Force is directly proportional to mass and acceleration (F = ma).

Question 31

What is the formula for torque?

Answer 31

τ = rFsin(θ)

Question 32

True or False: An object in motion stays in motion unless acted upon by a net external force.

Answer 32

True

Question 33

What is the definition of a scalar quantity?

Answer 33

A quantity that has magnitude but no direction.

Question 34

What is the definition of a vector quantity?

Answer 34

A quantity that has both magnitude and direction.

Question 35

Fill in the blank: The formula for the conservation of angular momentum is ______.

Answer 35

L_initial = L_final

Question 36

What is the formula for the speed of a wave?

Answer 36

v = fλ

Question 37

What is the definition of buoyancy?

Answer 37

The upward force exerted by a fluid on an object immersed in it.

Question 38

True or False: The frequency of a wave is inversely related to its wavelength.

Answer 38

True

Question 39

What is the formula for the Doppler effect?

Answer 39

f' = f(v ± vo)/(v ∓ vs)

Question 40

Fill in the blank: The critical angle for total internal reflection is given by ______.

Answer 40

sin(θc) = n2/n1

Question 41

What is the definition of refraction?

Answer 41

The bending of light as it passes from one medium to another.

Question 42

What is the formula for the lens maker's equation?

Answer 42

1/f = (n-1)(1/R1 - 1/R2)

Question 43

True or False: The focal length of a convex lens is positive.

Answer 43

True

Question 44

What is the definition of electric current?

Answer 44

The rate of flow of electric charge.

Question 45

What is Ohm's Law?

Answer 45

V = IR

Question 46

Fill in the blank: The unit of electrical resistance is ______.

Answer 46

Ohm

Question 47

What is the formula for electrical power?

Answer 47

P = IV

Question 48

What is the definition of capacitance?

Answer 48

The ability of a system to store charge per unit voltage.

Question 49

True or False: Capacitors store energy in the form of an electric field.

Answer 49

True

Question 50

What is the formula for the energy stored in a capacitor?

Answer 50

U = 0.5CV²

Question 51

What is the definition of magnetic field?

Answer 51

A field around a magnet where magnetic forces can be observed.

Question 52

What is the formula for the magnetic force on a charged particle?

Answer 52

F = q(v × B)

Question 53

Fill in the blank: The unit of magnetic flux is ______.

Answer 53

Weber

Question 54

What is Faraday's Law of Electromagnetic Induction?

Answer 54

The induced electromotive force in a closed loop is equal to the rate of change of magnetic flux through the loop.

Question 55

True or False: Alternating current (AC) changes direction periodically.

Answer 55

True

Question 56

What is the formula for the period of a wave?

Answer 56

T = 1/f

Question 57

What is the definition of thermodynamics?

Answer 57

The study of heat and temperature and their relation to energy and work.

Question 58

What is the first law of thermodynamics?

Answer 58

Energy cannot be created or destroyed, only transformed.

Question 59

Fill in the blank: The unit of temperature in the SI system is ______.

Answer 59

Kelvin

Question 60

What is the definition of entropy?

Answer 60

A measure of the disorder or randomness in a system.

Question 61

What is the formula for the efficiency of a heat engine?

Answer 61

η = (W_out/Q_in)

Question 62

True or False: In an isothermal process, the temperature remains constant.

Answer 62

True

Question 63

What is the definition of a wave?

Answer 63

A disturbance that transfers energy from one place to another without transferring matter.

Question 64

What is the definition of a standing wave?

Answer 64

A wave that remains in a constant position and does not travel.

Question 65

Fill in the blank: The speed of sound in air at 20°C is approximately ______.

Answer 65

343 m/s

Question 66

What is the definition of thermal equilibrium?

Answer 66

A state in which two bodies in thermal contact do not exchange energy.

Question 67

What is the formula for the specific heat capacity?

Answer 67

Q = mcΔT

Question 68

True or False: The absolute zero temperature is 0 Kelvin.

Answer 68

True

Question 69

What is the definition of a photon?

Answer 69

A particle representing a quantum of light or other electromagnetic radiation.

Question 70

What is the formula for the energy of a photon?

Answer 70

E = hf

Question 71

Fill in the blank: The speed of light in a vacuum is approximately ______.

Answer 71

3 × 10^8 m/s

Question 72

What is the definition of quantum mechanics?

Answer 72

The branch of physics that deals with the behavior of matter and light on the atomic and subatomic scale.

Question 73

What is the uncertainty principle?

Answer 73

It states that the position and momentum of a particle cannot both be precisely determined at the same time.