equations xxx Flashcards by Amelia Santos

Q

kinetic energy

A

0.5xmassxvelocity2

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Q

gravitational energy

A

massxgravitational field strengthxheight

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Q

work done

A

force x distance

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Q

power equations

A

energy transferred/time
workdone/time
p.d x current
current2 x resistance

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Q

efficiency

A

useful output energy transfer/total input energy transfer

useful power output/total power input

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Q

change in thermal energy

A

mass x specific heat capacity x temp change

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Q

specific heat capacity

A

change in thermal energy/mass x temp change

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Q

what does sulfur dioxide lead to?

A

acid rain

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Q

what does nuclear power run on

A

uranium and plutonium

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Q

charge flow

A

current x time

power/p.d

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Q

current

A

charge flow/time

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Q

energy transferred

A

charge x potential difference

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Q

resistance - ohms

A

resistance x current

power/current2

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Q

energy triangle too

A

power x time

energy

power. time

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Q

mains electricity

A

230v

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Q

density

A

mass/volume

Q

specific latent heat

A

energy for change of state=mass x specific latent heat

Q

irradiation

A

exposing an object to nuclear radiation

Q

contamination

A

when unwanted radioactive isotopes end up on other materials ,dangerous as they decay and emit ionising radiation

Q

workdone

A

force x distance

Q

electricity energy

A

p.dxcurrentxtime

Q

efficiency of energy transfer

A

useful energy output/total energy outputx100 AS PERCENTAGE

Q

potential difference

A

resistance x current

Q

alpha

A

2 PROTONS 2 NEUTRONS
2HE

least penetrating, stopped by paper.Highly ionising does the most damage, only travels a few cm in air

beta radiation

``` 0 -1 1 high speed electron little penetrating, stopped by aluminium middle ionising travels the maximum of 15cm in air ```

gamma radiation

an electromagnetic wave most penetrating, stopped by a few cm of lead least ionising can travel a few meters in air