Physics

Question 1

Energy

Answer 1

Gives us the ability to do work.

Question 2

Kinectic energy

Answer 2

The energy of movement.

Extra info : The faster an object moves the more kinetic energy it has.

Question 3

Heat/Thermal Energy

Answer 3

Energy that comes from anything giving heat.

Question 4

Sound Energy

Answer 4

The energy that air has when it is vibrating, which your ears and brain interpret as sounds.

Question 5

Electrical Energy

Answer 5

Energy coming from power stations or power outlets.

Question 6

Light energy

Answer 6

Energy of light.

Question 7

Mechanical Energy

Answer 7

The energy of an object in motion or the energy that is stored in objects by their position.

Question 8

Stored Energy/Potential Energy:

Answer 8

🟢Energy that is stored away for later use.

Energy that has the potential to become one of the forms of energy.

Question 9

Potential Chemical Energy

Answer 9

Energy that is stored in substances/ chemicals.
Example: Food, wood, Petrol/fuel.

Question 9

Potential Gravitational Energy

Answer 9

Energy that is stored in an object when it’s above the ground.

Extra Info: The higher an object is the more gravitational potential energy it has.

Question 10

Potential Elastic Energy

Answer 10

Energy that is stored in a stretched or squashed spring.

Question 11

Potential Nuclear Energy

Answer 11

Energy that is stored inside tiny atoms that make up all matter.

Question 12

What units is energy measured in?

Answer 12

Joules (J)

Question 13

1 kilojoule (Kg) = ?

Answer 13

1000 joules (j)

Question 14

Energy Transformation

Answer 14

When a form of energy is changes into a different form of energy.

Question 15

Energy Transfer

Answer 15

When energy is transferred from one object to another.

Question 16

Gravitational Potential Energy Equations:

Answer 16

Ep= mgh or Gravitational Potential energy = mass x gravity x height

Question 17

Steps when calculating

Answer 17

1. Write equation down
2. Convert–> m=kg , h= m
3. Fill-in. G=9.8, m=?, h=?
   4 .Calculate ( final)

Question 18

Kinetic Energy Equation

Answer 18

Ek= 1/2 x m x v²

Question 19

The law of conservation

Answer 19

Energy cannot be created or destroyed, it can only be transformed and transferred.

Question 20

Heat Transfer

Answer 20

When heat is transferred from one thing to another.

Question 21

Conduction

Answer 21

When heat is transferred between two objects that come in contact with eachother.

Question 22

Convention

Answer 22

When heat is transferred by heat flowing through liquid and gases. This is what causes heat to rise.

Question 23

Radiation

Answer 23

Heat that spreads outwards from any hot object.
For example, the sun radiates heat, so when you stand outside you can feel the heat.

Question 24

J –> Kj

Answer 24

divide by 1000

Question 25

Kj–> J

Answer 25

x 1000

Question 26

kj–>Mj

Answer 26

divide 1000

Question 27

Mj–> kj

Answer 27

x1000

Question 28

Efficiency formula

Answer 28

Useful energy out ÷ Total energy in x 100

Question 29

Joules–> define

Answer 29

How much energy is needed to lift one 100g apple off the ground