Energy Flashcards

1
Q

energy stores

A

thermal
kinetic
gravitational potential
elastic potential
chemical
magnetic electrostaticic
nuclear

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2
Q

what happens if a system changes

A

the energy is transferred

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3
Q

work done

A

when current flows or by a force moving a object

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4
Q

specific heat capacity

A

substance amount of energy to raise the temperature of 1 kg of the substance by 1* C

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5
Q

j - kj

A

divide by 1000

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6
Q

kinetic energy

A

energy stored in a moving object

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7
Q

gravitational potential energy

A

energy stored due to an objects positon above

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8
Q

elastic potential energy

A

energy stored in stretched spring

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9
Q

thermal energy

A

energy stored due to an objects temp

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10
Q

elastic potential energy

A

energy stored in stretched spring

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11
Q

what does friction cause

A

energy is transferred to thermal energy

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11
Q

what does friction cause

A

energy is transferred to thermal energy

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12
Q

reducing unwanted energy transfers

A

using lubricants on fixed points
removing air particles from the points

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13
Q

reducing unwanted energy transfers

A

using lubricants on fixed points
removing air particles from the points

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14
Q

mechanical work

A

using a force to move an object

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15
Q

electrical work

A

a current transferring energy

16
Q

electrical work

A

a current transferring energy

17
Q

work done equation

A

work done (j)=force (n) times distance (m)

18
Q

work done equation

A

work done (j)=force (n) times distance (m)

19
Q

work done equation

A

work done (j)=force (n) times distance (m)

20
Q

work done equation

A

work done (j)=force (n) times distance (m)

20
Q

work done equation

A

work done (j)=force (n) times distance (m)

21
Q

work done equation

A

work done (j)=force (n) times distance (m)

22
Q

power equations 1

A

power w = energy transferred j / time s

23
power equation 2
power w = work done j /time s
24
efficiency equation 1
efficiency = useful output energy transfer/ total input energy transfer
25
efficiency equation 2
efficiency =
26
efficiency equation 2
efficiency = useful power output/
27
efficiency equation 2
efficiency = useful power output/ total power input
28
thermal conductivity
higher the conductivity of a material the higher rate of energy transfer by conduction across that material
28
thermal conductivity
higher the conductivity of a material the higher rate of energy transfer by conduction across that material
29
specific heat capacity practical
put beaker o balance and press 0