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Flashcards in power work and energy Deck (28):
1

types of radiation

alpa beta and gamma

2

how can alpha be stopped

a sheet of paper

3

how can beta be stopped

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

4

what stops gamma

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

5

uses of alpha radiation

ionisation is good for smoke detectors

6

uses of beta radiation

can be used to find the thickness of materials

7

uses of gamma radiation

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

8

how is wind energy sourced

wind turbines turn wind into electricity

9

advantages of wind energy

potentially infinite energy supply
can be found singularly or in farms

10

disadvantages of wind energy

wind turbines can be very costly to implement
can be an eyesore in the country side

11

how is solar energy sourced

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

12

advantages of solar energy

potentially an infinite supply

13

disadvantages of solar energy

implementation of solar panels can be costly

14

where is tidal sourced

the movement of tides drives turbines

15

advantages of tidal

ideal for an island like the UK
can double as a bridge and prevent flooding

16

disadvantages of tidal

only a few estuaries are suitable

17

where is geothermal sourced

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

18

advantages of geothermal

potentially an infinite energy source

19

disadvantages

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

20

how is nuclear energy sourced

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

21

what are the advantages of nuclear

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

22

what are the disadvantages of nuclear

nuclear reactors are expensive to run
leakage of nuclear waste can have a devastating impact on the environment and people.

23

how is coal sourced.

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

24

what are the advantages of coal

it is relatively cheap to mine and convert into energy

25

disadvantages of coal

releases atmospheric pollutions

26

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

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

27

what is work done equation

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

28

what is work done equal to

energy transferred