Brainscape's Knowledge GenomeTM

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


See full index

Science > Physics > Flashcards

Physics Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

Renewable energy

A

Energy from sources that will not run out

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

Non-renewable energy

A

Energy from sources that will run out

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

Renewable energy sources list them

A

Wind
Solar
Tidal
Wave
Biofuels
Geothermal

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

Non-renewable energy resources

A

Coal

Gas

Nuclear

Oil

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

What does Carbon neutral

A

A balance between emitting and absorbing carbon from the atmosphere

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What fuel is carbon neutral

A

Biofuels

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

Stages generating electricity in a nuclear power station

A

Reaction triggered

Water is heated

Hot water circulated

Steam created

Steam energy converted to electrical energy

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

Why biofuels considered carbon neutral

A

The plants used to make biofuels absorb CO2 as they make CO2 emissions

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

Advantages renewable energy

A

More jobs for people

Reliable

Can never run out

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Disadvantages renewable energy

A

Initial cost is high

Renewable energy sites require a lot of space

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Advantages non-renewable energy

A

Can give people jobs

Easy to use

Huge profits can be generated in mining coal or selling oil

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

Disadvantages non-renewable energy

A

Will run out

Can cause pollution

Unreliable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How does a wind turbine generate electricity

A

Wind makes blades spin creating kinetic energy which is then converted to electrical energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How does hydroelectric system work

A

Streams and rivers flow downhill which has potential energy because of its height

Hydropower systems convert this potential energy into kinetic energy in a turbine which drives a generator to produce electricity

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

How solar cells generate electricity

A

Sunlight is absorbed by cells in the panel

This energy creates electrical charges that move in response to an internal field in the cell causing electricity to flow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What type of energy do geothermal power stations absorb

A

Geothermal power plants rely on heat below the Earth

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

Differences between solar cells and solar heating panels

A

Solar cells produce an electric field

Solar panels turn sunlight into heat

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

How does a solar power tower work

A

Steam from a fluid powers a turbine generator to generate electricity

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

How do geothermal power plants work

A

Steam from fluids found underground drives turbines that generate electricity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

A method to investigate the power output of a solar cell

A

Shine a desk lamp on the panel so that the motor turns

Connect a voltmeter across the solar panel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Problems with fossil fuels

A

Release large amounts of carbon dioxide

Dangerous to produce

Acid rain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Waste products of fossil fuels

A

Fly ash

Bottom ash

Boiler slag

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Waste products of nuclear fuels

A

Uranium mill tailings

Reactor fuel

Radioactive waste

24
Q

Sulfur dioxide problems with environment

A

Acid rain

Deforestation

25
Q

How carbon dioxide emissions can be reduced from fossil fuel power stations

A

Carbon dioxide is stored deep underground in geological formation

26
Q

Disadvantages hydroelectric

A

Expensive

Not always safe

There are droughts

27
Q

Advantages hydroelectric

A

Sustainable

Clean

Reduces risk of flooding

28
Q

Advantages solar power

A

Helps people become more sustainable at home

Never run out

29
Q

What factors would have to be considered when building a new power station

A

Fuel availability

Land cost

Land availability

30
Q

Which energy resouce produces most energy

A

Fossil fuels

31
Q

Displacement

A

Distance without a change in direction

32
Q

Vector quanity

A

Physical quantities with size (magnitude) and direction

33
Q

Scalar quantites

A

Physical quantites with size and no direction

34
Q

Vector quantity examples

A

Force

Weight

Displacement

Velocity

Acceleration

Magnetic

35
Q

Scalar quantites examples

A

Mass

Energy

Distance

Speed

Time

Power

36
Q

Velocity

A

How fast and in what direction a point is moving

37
Q

Contact force

A

Any force that occurs as a result of two objects making contact with each other

38
Q

Non-contact force

A

A force which acts on an object without coming physically in contact with it

39
Q

Contact forces examples

A

Air resistance

Tension

Friction

Thrust

40
Q

Non contact force examples

A

Magnet

Nuclear

Electrostatic

Gravitational

41
Q

Newton’s 3rd law of motion

A

For every action there’s an equal and opposite reaction

42
Q

Forces acting on a diver as they are falling throught the air

A

Gravity

Air resistance

Drag

43
Q

Forces acting on a diver as they enter the water

A

Upthrust

Friction

Drag

44
Q

Weight

A

The force of gravity pulling things downwards

45
Q

Friction

A

It tries to stop two things sliding over each other

46
Q

Upthrust

A

A force that pushes things upwards

47
Q

Air resistance

A

It tries to stop things moving through the air

48
Q

Thrust force

A

Pushes things upwards when they’re in liquid

49
Q

Balanced force

A

Where the effect of one force is cancelled out by another

50
Q

Unblanced force

A

The force applied in one direction is greater than the force applied in the opposite direction

51
Q

Moment

A

Turning force around a fixed pivot

52
Q

How to work out moment

A

Force x distance

53
Q

Ways to increase moment

A

Increase the distance from the pivot

Increase the force applied

54
Q

Lever

A

A rigid body capable of lifting a heavy load with a small effort

55
Q

A mechanic pushes on a spanner with a force of 50N

He pushes on it 40cm

Calculate moment of force

A

Moment = ?
F = 50N
d = 0.4m

50 x 0.4 = 20Nm

56
Q

How to find gear ratio

A

Number of teeth on the driven
_________________________________

Number of teeth on the driver

57
Q

Centre of mass

A

The point at which the object will balance

Science (5 decks)

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