power work and energy

Question 1

types of radiation

Answer 1

alpa beta and gamma

Question 2

how can alpha be stopped

Answer 2

a sheet of paper

Question 3

how can beta be stopped

Answer 3

can penetrate air and paper but is stopped by a few millimetres of aluminium

Question 4

what stops gamma

Answer 4

can only be stopped by a few centimetres of lead, or many metres of concrete

Question 5

uses of alpha radiation

Answer 5

ionisation is good for smoke detectors

Question 6

uses of beta radiation

Answer 6

can be used to find the thickness of materials

Question 7

uses of gamma radiation

Answer 7

in the treatment of cancer, testing equipment and sterilising medical equipment

Question 8

how is wind energy sourced

Answer 8

wind turbines turn wind into electricity

Question 9

advantages of wind energy

Answer 9

potentially infinite energy supply

can be found singularly or in farms

Question 10

disadvantages of wind energy

Answer 10

wind turbines can be very costly to implement

can be an eyesore in the country side

Question 11

how is solar energy sourced

Answer 11

energy from the sunlight is captured in solar panels and converted into electricity

Question 12

advantages of solar energy

Answer 12

potentially an infinite supply

Question 13

disadvantages of solar energy

Answer 13

implementation of solar panels can be costly

Question 14

where is tidal sourced

Answer 14

the movement of tides drives turbines

Question 15

advantages of tidal

Answer 15

ideal for an island like the UK

can double as a bridge and prevent flooding

Question 16

disadvantages of tidal

Answer 16

only a few estuaries are suitable

Question 17

where is geothermal sourced

Answer 17

in volcanic regions it is possible to use the natural heat of the earth
cold water is pumped underground and forced out as steam
stream can be used for heating or to power turbines creating electricity

Question 18

advantages of geothermal

Answer 18

potentially an infinite energy source

Question 19

disadvantages

Answer 19

can be expensive to set up and only works in areas of volcanic activity. volcanic activity may calm down.

Question 20

how is nuclear energy sourced

Answer 20

radioactive materials such as uranium are mined
electricity is generated from the energy that is released when the atoms of these minerals are split by nuclear fission in nuclear reactors

Question 21

what are the advantages of nuclear

Answer 21

a small amount of radioactive material produces a lot of energy
raw materials are very cheap

Question 22

what are the disadvantages of nuclear

Answer 22

nuclear reactors are expensive to run

leakage of nuclear waste can have a devastating impact on the environment and people.

Question 23

how is coal sourced.

Answer 23

formed from fossilled plants and consisting of carbon with various organic and sometimes inorganic compounds

mined from seams of coal that is sandwiched between layers of rock

burnt to provide heat or energy

Question 24

what are the advantages of coal

Answer 24

it is relatively cheap to mine and convert into energy

Question 25

disadvantages of coal

Answer 25

releases atmospheric pollutions

Question 26

how does is the sun the source for all energy except geothermal and nuclear

Answer 26

wind is caused by the sun heating the air

fossil fuels are stores of energy that came from the sun millions of years ago

radiation from the sun can be absorbed by solar panels to provide hot water

most HEP comes ultimately from the sun. The suns rays cause water to evaporate from oceans and land surface. this water vapour in the atmosphere eventually forms clouds

Question 27

what is work done equation

Answer 27

force x distance moved by the force in the direction of the force

Question 28

what is work done equal to

Answer 28

energy transferred