1
Q
How is size linked to the fuel consumption of cars
A
- size and design of car engines determine how powerful they are
- larger, ore more powerful engines transfer more energy from its fuel every second, so the higher the fuel consumption
2
Q
What things affect fuel consumption?
A
- mass of car
- speed car is driven at
- size of engine
- road conditions affects how much you need to break, affecting fuel consumption
- driving style: faster accelerations need more energy and so more fuel, frequent braking and acceleration increases fuel consumption
3
Q
What is fuel consumption?
A
-fuel consumption of a car is usually stated as the distance travelled using a certain amount of fuel
4
Q
What are the disadvantages of fossil fuel for cars?
A
- environmental problems like acid rain and climate change (caused by greenhouse effect)
- non-renewable (run out one day)
5
Q
What are the disadvantages of biofuel for cars?
A
- give off carbon dioxide when burnt
- pollution through prouction
6
Q
What are the advantages of biofuel for cars?
A
- renewable (won’t run out)
- no overall increase in carbon dioxide levels in the atmosphere as plants are grown to produce biofuel
- not as much pollution released as fossil fuels
7
Q
What are the disadvantages of electric cars?
A
- electricity to charge car most likely comes from power stations , so they pollute, as most power stations currently burn fossil fuels to produce electricity
- expensive to make and buy
- limited performance compared to ordinary cars
- limited charging places
8
Q
What are the advantages of electric cars?
A
- don’t release pollution at the point of use
- quite
- can be made better by giving the vehicles solar panels to generate electricity, no pollution produced at all
9
Q
Why doe open windows increase fuel consumption?
A
- open windows increase drag (air resistance/friction)
- because energy from fuel is needed to work against friction
- so fuel consumption increases
10
Q
What gases are released when fossil fuels are burnt?
A
- carbon dioxide
- nitrogen dioxide
- water vapour
