Physics

Question 1

Renewable energy

Answer 1

Energy from sources that will not run out

Question 2

Non-renewable energy

Answer 2

Energy from sources that will run out

Question 3

Renewable energy sources list them

Answer 3

Wind
Solar
Tidal
Wave
Biofuels
Geothermal

Question 4

Non-renewable energy resources

Answer 4

Coal

Gas

Nuclear

Oil

Question 5

What does Carbon neutral

Answer 5

A balance between emitting and absorbing carbon from the atmosphere

Question 6

What fuel is carbon neutral

Answer 6

Biofuels

Question 7

Stages generating electricity in a nuclear power station

Answer 7

Reaction triggered

Water is heated

Hot water circulated

Steam created

Steam energy converted to electrical energy

Question 8

Why biofuels considered carbon neutral

Answer 8

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

Question 9

Advantages renewable energy

Answer 9

More jobs for people

Reliable

Can never run out

Question 10

Disadvantages renewable energy

Answer 10

Initial cost is high

Renewable energy sites require a lot of space

Question 11

Advantages non-renewable energy

Answer 11

Can give people jobs

Easy to use

Huge profits can be generated in mining coal or selling oil

Question 12

Disadvantages non-renewable energy

Answer 12

Will run out

Can cause pollution

Unreliable

Question 13

How does a wind turbine generate electricity

Answer 13

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

Question 14

How does hydroelectric system work

Answer 14

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

Question 15

How solar cells generate electricity

Answer 15

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

Question 16

What type of energy do geothermal power stations absorb

Answer 16

Geothermal power plants rely on heat below the Earth

Question 17

Differences between solar cells and solar heating panels

Answer 17

Solar cells produce an electric field

Solar panels turn sunlight into heat

Question 18

How does a solar power tower work

Answer 18

Steam from a fluid powers a turbine generator to generate electricity

Question 19

How do geothermal power plants work

Answer 19

Steam from fluids found underground drives turbines that generate electricity

Question 20

A method to investigate the power output of a solar cell

Answer 20

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

Connect a voltmeter across the solar panel

Question 21

Problems with fossil fuels

Answer 21

Release large amounts of carbon dioxide

Dangerous to produce

Acid rain

Question 22

Waste products of fossil fuels

Answer 22

Fly ash

Bottom ash

Boiler slag

Question 23

Waste products of nuclear fuels

Answer 23

Uranium mill tailings

Reactor fuel

Radioactive waste

Question 24

Sulfur dioxide problems with environment

Answer 24

Acid rain

Deforestation

Question 25

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

Answer 25

Carbon dioxide is stored deep underground in geological formation

Question 26

Disadvantages hydroelectric

Answer 26

Expensive Not always safe There are droughts

Question 27

Advantages hydroelectric

Answer 27

Sustainable Clean Reduces risk of flooding

Question 28

Advantages solar power

Answer 28

Helps people become more sustainable at home Never run out

Question 29

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

Answer 29

Fuel availability Land cost Land availability

Question 30

Which energy resouce produces most energy

Answer 30

Fossil fuels

Question 31

Displacement

Answer 31

Distance without a change in direction

Question 32

Vector quanity

Answer 32

Physical quantities with size (magnitude) and direction

Question 33

Scalar quantites

Answer 33

Physical quantites with size and no direction

Question 34

Vector quantity examples

Answer 34

Force Weight Displacement Velocity Acceleration Magnetic

Question 35

Scalar quantites examples

Answer 35

Mass Energy Distance Speed Time Power

Question 36

Velocity

Answer 36

How fast and in what direction a point is moving

Question 37

Contact force

Answer 37

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

Question 38

Non-contact force

Answer 38

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

Question 39

Contact forces examples

Answer 39

Air resistance Tension Friction Thrust

Question 40

Non contact force examples

Answer 40

Magnet Nuclear Electrostatic Gravitational

Question 41

Newton's 3rd law of motion

Answer 41

For every action there's an equal and opposite reaction

Question 42

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

Answer 42

Gravity Air resistance Drag

Question 43

Forces acting on a diver as they enter the water

Answer 43

Upthrust Friction Drag

Question 44

Weight

Answer 44

The force of gravity pulling things downwards

Question 45

Friction

Answer 45

It tries to stop two things sliding over each other

Question 46

Upthrust

Answer 46

A force that pushes things upwards

Question 47

Air resistance

Answer 47

It tries to stop things moving through the air

Question 48

Thrust force

Answer 48

Pushes things upwards when they're in liquid

Question 49

Balanced force

Answer 49

Where the effect of one force is cancelled out by another

Question 50

Unblanced force

Answer 50

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

Question 51

Moment

Answer 51

Turning force around a fixed pivot

Question 52

How to work out moment

Answer 52

Force x distance

Question 53

Ways to increase moment

Answer 53

Increase the distance from the pivot Increase the force applied

Question 54

Lever

Answer 54

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

Question 55

A mechanic pushes on a spanner with a force of 50N He pushes on it 40cm Calculate moment of force

Answer 55

Moment = ? F = 50N d = 0.4m 50 x 0.4 = 20Nm

Question 56

How to find gear ratio

Answer 56

Number of teeth on the driven _________________________________ Number of teeth on the driver

Question 57

Centre of mass

Answer 57

The point at which the object will balance