Topic 3 Flashcards
1
Q
mechanical work
A
force acting on an object e.g. push/ stretching
2
Q
insulating
A
- thicker walls for slower rate of transfer
- cavity walls have a gap in between two walls
3
Q
how to decrease energy wasted in a motor
A
lubricate moving parts
4
Q
non renewable energy
A
- fossil fuels e.g. gas, coal, oil current.y enough for demand but are running out, produces co2 which adds tpo teh greenhouse effect, can produce sulfur dioxide which causes acid rain, spills can cause environmental problems
- nuclear energy but difficut to dispose of
5
Q
renewable energy
A
- solar
- wind
- tidal
- geothermal
- bio-fuels
6
Q
biofuels
A
created from plants and animal dung
reliable as it is fast
in some regions forests have been cleared to grow biofuels
7
Q
wind power
A
- alot are needed to be effective
- ruins teh view
- work by turbines turning connected to generator
- weather dependant
8
Q
solar panels
A
- costly to install
- weather dependant
- small scale
