Section 4: Energy

Question 1

What is power

Answer 1

Rate at which work is done

Question 2

Gpe =

Answer 2

M x g x h

Question 3

Kinetic energy =

Answer 3

1/2mv*2

Question 4

Work done =

Answer 4

Force x distance

Question 5

Efficiency =

Answer 5

Useful energy output/ total energy input

Question 6

Power =

Answer 6

Work/ time

Question 7

What is energy transferee equal to

Answer 7

Work done

Question 8

Pros of fossil fuels

Answer 8

Stored in large quantities, large amount produced in a short amount of time, profitable to run

Question 9

Cons of fossil fuels

Answer 9

Non renewable, release CO2 (increase global warming)

Question 10

Pros of wind power

Answer 10

Eco friendly, renewable, cost effective, can be built on existing farms

Question 11

Cons of wind power

Answer 11

Ruins landscapes, kills bats and birds, slow, reliable on wind, not safe in storms

Question 12

Pros of solar power

Answer 12

Eco friendly, renewable, low maintenance, reduce electricity bills, can be installed on roofs

Question 13

Cons of solar power

Answer 13

Reliant on weather, only produce energy during the day, slow, initial cost

Question 14

Pros of geothermal power

Answer 14

Eco friendly, renewable, abundant, no fuel needed

Question 15

Cons of geothermal power

Answer 15

High initial cost, can cause earthquake when setting up plant, uses up a lot of water

Question 16

Pros of hydro-electric power

Answer 16

Eco friendly, renewable, cost effective, reliable, safe, clean energy source

Question 17

Cons of hydro-electric power

Answer 17

Expensive, huge damns effect river flow, can cause sudden occurrence of floods

Question 18

Pros of nuclear power

Answer 18

Low pollution, reliable, more proficient than fossil fuel

Question 19

Cons of nuclear power

Answer 19

Dangerous if explodes, produces nuclear waste, non renewable, expensive