Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

GCSE Physics > P1 Energy > Flashcards

P1 Energy Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards GCSE Religious Studies - Edexcel Route A flashcards AP® Physics flashcards GCSE Religious Studies - Eduqas Route A flashcards GCSE Geography - AQA flashcards GCSE Religious Studies - Edexcel Route B flashcards GCSE Religious Studies - Eduqas Route B flashcards
1
Q

What are the 8 different types of energy stores?

A
  • Thermal
  • Kinetic
  • Gravitational
  • Elastic
  • Chemical
  • Magnetic
  • Electrostatic
  • Nuclear
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the different ways energy can be transferred? (Pathways)

A
  • Mechanically
  • Electrically
  • Heating
  • Radiating
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How is energy transferred by heating with a kettle and water?

A
  • Energy is transferred to the water by heating into the water’s thermal energy store which causes the temperature to rise
  • Energy is electrically transferred to the thermal energy store of the kettle’s heating element, which transfers energy by heating to the water’s thermal energy store
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Work done

A
  • Energy transferred

- Work can be done when current flows or by a force moving an object

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Give examples of work done

A
  • Initial force exerted by a person throwing a ball
  • A ball falling
  • Friction between the cars breaks
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Movement

A
  • Anything that moves has it’s own kinetic energy store

- If energy is transferred to, then the object speeds up and from the object slows down

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the effect of mass and speed on the kinetic energy store of an object?

A

The greater the mass and the faster it is going means the more energy there will be in the Kinetic energy store

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Kinetic energy formula

A

E(k) = 1/2 * mv ^ 2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

GPE

A
  • Lifting an object in a gravitational field requires work which causes a transfer of energy to the gravitational potential energy store of the raised object
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What factors effect GPE?

A
  • Mass
  • Height
  • Strength
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

GPE equation

A

E(p) = mgh

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What transfer of energy happens with falling objects?

A
  • Energy form the gravitational potential energy store is transferred to its kinetic energy store
  • When there is no air resistance, the energy lost from g.p.e store is the same amount of energy gained in the kinetic energy store
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Elastic potential energy

A
  • Stretching or squashing an object can transfer energy to its elastic potential energy
  • As long as the limit of proportionality has not been exceeded, energy in the eps store
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

EPE equation

A

E(0) = 1/2k * e ^ 2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Specific Heat Capacity

A
  • Specific Heat Capacity is the amount of energy needed to raise the temperature of 1kg of substance by 1 degrees celcius
  • More energy needs to be transferred to the thermal energy store to increase their temperature than others
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Specific Heat Capacity equation

A

change in thermal energy (E) = mc * change in temperature (degrees celcius)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Law of conservation of energy

A

Energy cannot be created or destroyed, only transferred

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is ‘wasted energy’?

A

Dissipated energy is energy that is being stored in a way that is not useful

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Power

A

Power is the rate of energy transfer, or the rate of doing work

20
Q

What is power measure in?

A

Watts. (1 watt = 1 joule of energy transferred per second)

21
Q

Power equations

A 
Power = Energy transferred / time
Power = Work done / time
22
Q

What is a powerful machine?

A

A machine that transfers a lot of energy in a short space of time

23
Q

What does lubrication do to frictional forces?

A

Reduces frictional forces

24
Q

Give examples of frictional forces

A

Air resistance

25
Q

What objects help remove frictional forces?

A

Lubricants

26
Q

Conduction

A
  • Particles vibrate and collide more with each other

- Energy is transferred between the particles’ kinetic energy stores

27
Q

Thermal conductivity

A

A measure of how quickly energy is transferred through a material in this way

28
Q

Convection

A
  • Warmer and less region will rise above denser, cooler regions
  • Energetic particles move away from hotter to cooler regions
29
Q

What are some methods to reduce energy transfer by heating (Insulation)

A
  • Thick walls made from a material with a low thermal conductivity
  • Thermal insulation
  • Loft insulation
  • Double-glazed windows
  • Draught excluders
  • Cavity wall insulation
30
Q

Efficiency equation

A

Useful output energy transfer / total input energy transfer

useful power output / total power input

31
Q

Why is no device 100% efficient?

A

Energy is usually transferred to useless thermal energy stores

32
Q

What are the 3 main non-renewable energy resources?

A
  • Coal
  • Oil
  • Natural gas
33
Q

Give some main renewable energy resources

A
  • The sun
  • Wind
  • Water waves
  • Hydro-electricity
  • Bio-fuel
  • Tides
  • Geothermal
34
Q

What are some uses of non-renewable resources?

A
  • Heating

- Transport

35
Q

Wind power

A
  • Wind turbines in exposed places like moors and coasts
  • No pollution
  • Very noisy
  • Initial cost is high
  • No permanent damage
36
Q

Solar power

A
  • No pollution
  • Remote places
  • Very reliable source in the daytime
  • Can’t increase the power output
  • Initial costs are high
37
Q

Geothermal power

A
  • Use the slow decay of various radioactive elements deep inside the earth
  • Does minor damage to the environment
  • Aren’t many suitable locations
38
Q

Hydro-electric power

A
  • No pollution
  • Flood allows kinetic energy
  • Immediate response
  • Cause rotting to the environment
  • Initial costs are high but no fuel costs
39
Q

Wave power

A
  • No pollution
  • Fairly unreliable
  • Initial costs are high but it is never likely to provide energy on a large scale
40
Q

Tidal barrages

A
  • Big damns built across river estuaries
  • No pollution
  • Tides produces by the gravitational pull of the sun and moon
  • Initial costs are moderately high, but no fuel costs and minimal running costs
41
Q

Bio fuels

A

Renewable energy resources created from either plant products or animal drug

42
Q

Are bio fuels carbon neutral?

A
  • Arguably if you grow plants at the rate you are growing things
43
Q

Are biofuels reliable?

A
  • Semi reliable
  • They cannot respond to immediate energy demands
  • The cost is very high
44
Q

are non-renewables reliable?

A
  • Yes

- They can respond to immediate energy demands very quickly

45
Q

What are some environmental problems of non-renewable resources?

A
  • CO2 is released and contributes to global warming
  • Sulfur dioxide can cause acid rain
  • Coal mining messes the landscape
  • Oil spillages cause serious environmental problems
  • Nuclear waste is very dangerous and difficult to dispose of
46
Q

What are some environmental problems of non-renewable resources?

A
  • CO2 is released and contributes to global warming
  • Sulfur dioxide can cause acid rain
  • Coal mining messes the landscape
  • Oil spillages cause serious environmental problems
  • Nuclear waste is very dangerous and difficult to dispose of

GCSE Physics (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions