P1 - Energy Stores and Transfers

Question 1

What does friction cause energy to do?

Answer 1

Be transferred into a thermal energy store

Question 2

What is the equation for power?

Answer 2

P=E/t

Question 3

What does t stand for?

Answer 3

Time

Question 4

What is dissipated energy?

Answer 4

Wasted energy

Question 5

What is the equation for efficiency?

Answer 5

Efficiency=Useful output/ total input

Question 6

Can energy be created or destroyed?

Answer 6

No

Question 7

How many stores of energy are there?

Answer 7

7

Question 8

What is kinetic energy?

Answer 8

The energy stored in a moving object, all moving objects store kinetic energy

Question 9

What is thermal energy?

Answer 9

The energy stored in a substance or an object because of it’s temperature

Question 10

What is power measured in?

Answer 10

W- Watts

Question 11

What is the gravitational field strength of Earth?

Answer 11

9.8N/kg

Question 12

What is the equation of weight?

Answer 12

W=mg

Question 13

What is mechanical working?

Answer 13

An energy transfer that involves a force, surfaces being in contact and particles moving

Question 14

What 2 qualities of an object causes it to store more gravitational potential energy?

Answer 14

More mass and higher in the air

Question 15

What is energy and work done measured in?

Answer 15

J - joules

Question 16

How do you calculate work done?

Answer 16

W=Fs

Question 17

What is heating by particles?

Answer 17

Heat moving from one place to another via conduction and convection

Question 18

How do you calculate kinetic energy?

Answer 18

E=1/2 x m x v squared

Question 19

How do you calculate velocity?

Answer 19

distance/time or square root of E/0.5

Question 20

What is elastic potential energy?

Answer 20

The energy stored in a stringy object when you stretch or squash it

Question 21

What is force measured in?

Answer 21

N- Newtons

Question 22

What is electrical working?

Answer 22

An energy transfer through wires (current).

Question 23

What do you measure gravitational field strength in?

Answer 23

N/kg

Question 24

How do you calculate weight?

Answer 24

W=mg

Question 25

What is gravitational potential energy?

Answer 25

The energy stored in an object because of it’s position above the ground

Question 26

How do you calculate gravitational potential energy?

Answer 26

E=mgh

Question 27

What does h stand for?

Answer 27

Height

Question 28

What is height or distance measured in and must be converted to?

Answer 28

Metres (m)

Question 29

What does s stand for?

Answer 29

Distance

Question 30

What is chemical energy?

Answer 30

The energy stored in fuel such as muscles, a battery and petrol

Question 31

What is heating by radiation?

Answer 31

An energy transfer that needs heat radiation and any EM (electromagnetic) / light waves

Question 32

What type of energy transfer is sound waves?

Answer 32

Mechanical working

Question 33

How do you calculate elastic potential energy?

Answer 33

E = 1/2 x k x e squared

Question 34

What does e stand for

Answer 34

Extension (stretched or squashed)

Question 35

What is spring constant measured in?

Answer 35

N/m

Question 36

What does k stand for?

Answer 36

Spring constant

Question 37

What is extension measured in?

Answer 37

Metres (m)