Energy Stores And Transfers And Resources paper 1

Question 1

How do you calculate energy changes for kinetic energy?

Answer 1

Kinetic energy= 0.5 x mass x (speed)²

Question 2

How do you calculate potential energy?

Answer 2

Gpe= mass x gravitational field strength x height

Question 3

How do you calculate elastic energy

Answer 3

Epe= 0.5 x spring constant x (extension)²

Question 4

What is internal energy

Answer 4

Total kinetic and potential energy of all the particles that make up a system

Question 5

What is kinetic energy measured in?

Answer 5

Joules (J)

Question 6

What is specific heat capacity?

Answer 6

A substance is the anount of energy required to raise the temperature

Question 7

How to calculate change in thermal energy?

Answer 7

Change in thermal energy= mass x specific heat capacity x temperature change.

Question 8

True or false: energy can be transferred usefully, stored or dissipated

Answer 8

Trur

Question 9

the rate of cooling depend on the thickness and thermal _________ of the walls

Answer 9

Conductivity

Question 10

What is renewable energy?

Answer 10

It can be replenished

Question 11

What is non renewable energy?

Answer 11

The source will eventually run out

Question 12

Is biofuel renewable or non renewable?

Answer 12

Renewable

Question 13

Is wind renewable or non renewable?

Answer 13

Renewable

Question 14

Is solar renewable or non renewable?

Answer 14

Renewable

Question 15

Ia nuclear fuel renewable or non renewable?

Answer 15

Non renewable

Question 16

Is oil and gas renewable or non renewable?

Answer 16

Non renewable

Question 17

What is biofuels main uses?

Answer 17

Transpirt and electricity generation?

Question 18

What is solar energys main uses?

Answer 18

Electricity and some heating generation

Question 19

What are radio waves used for?

Answer 19

Tv, radio and bluetooth.

Question 20

What are the radio waves energy?

Answer 20

Low energy waves

Question 21

What are microwaves used for?

Answer 21

Making food, satellitr communications

Question 22

How to microwave waves travel?

Answer 22

In a straight line.

Question 23

What is visible light used for?

Answer 23

Fibre optic communications

Question 24

How does visible light travel?

Answer 24

Optical fibres from one end to the other

Question 25

What are ultraviolet waves used for?

Answer 25

Energy efficient light bulbs, security marking snd sunbeds.

Question 26

What is ultraviolet in?

Answer 26

Energy efficient in light bulbs. UV waves are produced by the gas in the bulb

Question 27

How are UV waves absorbed?

Answer 27

By thr coating on the the bulb, which fluoresces giving off visible light

Question 28

What x-rays used for?

Answer 28

Medical imaging and treatments

Question 29

How is an xray used

Answer 29

Penetrate soft tissue but not bone. A photographic plate behind a person sill show shadows where bones are

Question 30

What are gamma rays used for?

Answer 30

Sterilising food, treatment of tumors.

Question 31

What is the most energetic wave in the electromagnetic spectrum?

Answer 31

Gamma rays

Question 32

What other uses are gamma rays?

Answer 32

Can be used to destroy bacteria and tumors

Question 33

What are the hazards of ultraviolet waves?

Answer 33

Can cause the skin to age prematuely and increase the risk of skin cancer.

Question 34

What can xrays, gamma rays cause?

Answer 34

Ionising radiation.

Question 35

What can ionising radiation do?

Answer 35

They can damage cells by ionising atoms and if absorbed by the nucleus of the cell, can cause gene mutations and cancer