Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

physics > energy stores > Flashcards

energy stores Flashcards

(82 cards)

Start Studying
1
Q

What is the unit of force?

A

Newton (N)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

True or False: Energy can be created or destroyed.

A

False

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the formula for calculating speed?

A

Speed = Distance / Time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Fill in the blank: The process of transferring heat through direct contact is called __________.

A

Conduction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the law of conservation of energy?

A

Energy cannot be created or destroyed, only transformed.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the unit of power?

A

Watt (W)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Which of the following is a scalar quantity? A) Force B) Velocity C) Speed D) Acceleration

A

C) Speed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What does the term ‘mass’ refer to?

A

The amount of matter in an object.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

True or False: An object in motion will stay in motion unless acted upon by an external force.

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the formula for calculating kinetic energy?

A

Kinetic Energy = 0.5 * mass * velocity^2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Fill in the blank: The resistance of a conductor is measured in __________.

A

Ohms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the principle of moments?

A

For an object in equilibrium, the sum of clockwise moments about a point equals the sum of anti-clockwise moments.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the effect of increasing temperature on the resistance of most conductors?

A

Resistance increases.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the formula for gravitational potential energy?

A

Gravitational Potential Energy = mass * gravitational field strength * height

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Which type of wave requires a medium to travel through?

A

Mechanical wave

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

True or False: Electromagnetic waves do not require a medium.

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is the speed of light in a vacuum?

A

Approximately 299,792,458 meters per second

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is the definition of frequency?

A

The number of waves that pass a point in one second.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Fill in the blank: The force of attraction between two masses is called __________.

A

Gravity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What is a renewable energy source?

A

An energy source that is replenished naturally, such as solar or wind energy.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What is the formula for Ohm’s Law?

A

Voltage = Current * Resistance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Which of the following is not a form of energy? A) Thermal B) Mechanical C) Magnetic D) Time

A

D) Time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What is the term for the rate at which work is done?

A

Power

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

True or False: The higher the frequency, the lower the energy of a wave.

A

False

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
What is the definition of work done?
Work done = Force * Distance moved in the direction of the force.
26
Fill in the blank: The total energy in a closed system remains __________.
Constant
27
What is the SI unit of energy?
Joule (J)
28
What is an insulator?
A material that does not allow electric current to flow easily.
29
What occurs during a chemical reaction?
Atoms are rearranged to form new substances.
30
Which type of energy is stored in stretched or compressed objects?
Elastic potential energy
31
What is the definition of acceleration?
The rate of change of velocity per unit time.
32
Fill in the blank: The unit of pressure is __________.
Pascal (Pa)
33
What is the role of a fuse in an electrical circuit?
To protect the circuit from excessive current.
34
True or False: Sound travels faster in air than in water.
False
35
What is the main function of a transformer?
To change the voltage of an alternating current.
36
What is the formula for calculating distance?
Distance = Speed * Time
37
Which of the following is a vector quantity? A) Distance B) Speed C) Force D) Mass
C) Force
38
What is the definition of a wave?
A disturbance that transfers energy from one place to another.
39
Fill in the blank: The center of mass of an object is the point where its mass is __________.
Concentrated
40
What happens to the total resistance in a series circuit when more resistors are added?
It increases.
41
What is the unit of electric charge?
Coulomb (C)
42
True or False: The frequency of a wave is inversely proportional to its wavelength.
True
43
What is the definition of wavelength?
The distance between two consecutive points in phase on a wave.
44
Fill in the blank: The energy transferred per unit charge is known as __________.
Voltage
45
What is the purpose of a circuit breaker?
To automatically stop the flow of current in case of a fault.
46
What is the definition of density?
Mass per unit volume.
47
Fill in the blank: The boiling point of water is __________ degrees Celsius.
100
48
What is the principle of conservation of momentum?
The total momentum of a closed system remains constant if no external forces act on it.
49
True or False: A permanent magnet can lose its magnetism if heated.
True
50
What is the formula for calculating pressure?
Pressure = Force / Area
51
What is the definition of thermal energy?
The total kinetic energy of the particles in a substance.
52
Fill in the blank: The process of changing from a liquid to a gas is called __________.
Evaporation
53
What is a non-renewable energy source?
An energy source that cannot be replenished in a short time, such as fossil fuels.
54
What is the role of an ammeter in a circuit?
To measure the current flowing through the circuit.
55
Which of the following has the highest frequency? A) Radio waves B) Microwaves C) Visible light D) Gamma rays
D) Gamma rays
56
What is the definition of equilibrium?
A state where all forces acting on an object are balanced.
57
Fill in the blank: The temperature at which a solid becomes a liquid is called its __________.
Melting point
58
What is the relationship between voltage, current, and resistance known as?
Ohm's Law
59
True or False: The amplitude of a wave is the maximum displacement from the rest position.
True
60
What is the definition of work done in the context of physics?
Work done is the energy transferred when a force moves an object.
61
What is the unit of frequency?
Hertz (Hz)
62
Fill in the blank: The __________ is the point where the force of gravity acts on an object.
Center of mass
63
What is a conductor?
A material that allows electric current to flow easily.
64
What is the effect of doubling the speed of an object on its kinetic energy?
The kinetic energy increases by a factor of four.
65
True or False: Light can be polarized.
True
66
What is the definition of specific heat capacity?
The amount of heat required to raise the temperature of 1 kg of a substance by 1 degree Celsius.
67
Fill in the blank: The __________ is the point in a mechanical system where the total torque is zero.
Equilibrium position
68
What is the primary source of energy for the Earth?
The Sun
69
What is the formula for calculating efficiency?
Efficiency = (Useful Energy Output / Total Energy Input) * 100%
70
True or False: The higher the mass of an object, the greater its gravitational force.
True
71
What is the definition of a thermal conductor?
A material that allows heat to pass through it easily.
72
Fill in the blank: In a vacuum, all electromagnetic waves travel at the speed of __________.
Light
73
What is the effect of increasing the area of a surface on pressure, given a constant force?
Pressure decreases.
74
What is the unit of measurement for electric potential difference?
Volt (V)
75
What is the definition of a longitudinal wave?
A wave in which the particle displacement is parallel to the direction of wave propagation.
76
True or False: All waves transfer energy.
True
77
What is the primary purpose of insulation in electrical wiring?
To prevent electric shock and short circuits.
78
Fill in the blank: The process of changing from a gas to a liquid is called __________.
Condensation
79
What is the principle of superposition?
When two or more waves overlap, the resultant displacement is the sum of the individual displacements.
80
What is the definition of a transverse wave?
A wave in which the particle displacement is perpendicular to the direction of wave propagation.
81
What happens to the temperature of a substance during a phase change?
The temperature remains constant.
82
Fill in the blank: The __________ is the amount of space an object occupies.
Volume

physics (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions