Physic-Energy

Question 1

What is the law of Conservation of energy

Answer 1

“Energy cannot be created, nor destroyed, only transferred”

Question 2

Define

Power

Answer 2

The rate of energy transfer

Question 3

Equation

Power

Answer 3

Energy/time

Question 4

Define

Work

Answer 4

Work done is the energy transferred when a force is applied to an object.

Question 5

Define

Kinetic Energy

Answer 5

The energy that an object possesses due to its motion.

Question 6

Formula for

Work

Answer 6

Work done = force × distance

Question 7

Define

Gravitational potential energy

GPE

Answer 7

The energy stored in an object due to its height above a gravitational body

Question 8

Define

Elastic potential energy

EPE

Answer 8

The energy stored in an object due to its shape

Question 9

Define

Thermal Energy

Answer 9

The energy stored in an object based on it’s temperature and heat

Question 10

What are the three mechanisms, thermal energy transfers

Answer 10

• Conduction
• Convection
• Radiation

Question 11

At what temp will particles stop virbrating

Answer 11

Absoulute 0(−273.15 °C)

Question 12

Define

Chemical Energy

Answer 12

The potential energy stored in the bonds between atoms in a molecule.

Question 13

Define

Nuclear Energy

Answer 13

The energy stored in the nucleus of an atom.

Question 14

Define

Electrical energy

Answer 14

The energy caused by the movement of electrons.

Note:Stored in electrostatic stores

Question 15

Define

Watts

Answer 15

The rate of energy transfer in electrical devices

Watts=Joules per second

Question 16

Formula for

Watt

Answer 16

Watts = Energy / Time

Note:Energy should be in joules and time in seconds

Question 17

Define

Radiant/Electromagnetic energy

Answer 17

The energy found in electromagnetic waves(including light)

Question 18

Define

Sound energy

Answer 18

The term to describle energy found in oscillating particles

Question 19

Formula

Kilowatt-Hours

Answer 19

Kilowatts * Time

Question 20

What is the formula for calculating kinetic energy?

Answer 20

Kinetic energy (KE) = 0.5 * mass (m) * velocity (v)^2

Question 21

True or False: Potential energy is the energy possessed by an object due to its position.

Answer 21

True

Question 22

Fill in the blank: The law of conservation of energy states that energy cannot be ______ or ______, only transformed from one form to another.

Answer 22

created; destroyed

Question 23

What is the efficiency formula?

Answer 23

Efficiency = (Useful energy output / Total energy input) * 100%

Question 24

Multiple Choice: Which of the following is a common unit of energy? A) Joule B) Meter C) Newton

Answer 24

A) Joule

Question 25

What is the difference between renewable and non-renewable energy sources?

Answer 25

Renewable energy sources can be replenished naturally (e.g., solar, wind), while non-renewable sources (e.g., fossil fuels) are finite and will deplete.

Question 26

True or False: An energy transfer is always 100% efficient.

Answer 26

False

Question 27

Fill in the blank: The gravitational potential energy can be calculated using the formula PE = ______ * mass (m) * height (h).

Answer 27

gravitational acceleration (g)

Question 28

What type of energy is associated with the motion of an object?

Answer 28

Kinetic energy

Question 29

Multiple Choice: Which of the following is NOT a form of energy? A) Thermal B) Chemical C) Momentum

Answer 29

C) Momentum

Question 30

Define

Useful energy

Answer 30

Energy transferred in a system’s intentional way

Question 31

Define

Wasted energy

Answer 31

Energy transferred in a system’s unintentional way

Question 32

Define

Dissapated energy

Answer 32

Energy that has transferred out of a a system into it’s surroundings

Question 33

Define

Sankey diagram

Answer 33

Diagrams used to meausure useful/wasted energy output

Text symbol:—↓→