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equation for efficiency
efficiency = useful output energy transfer /total input energy transfer
efficiency = useful power output/total power output
describe ways to increase the efficiency of a pan being heated
-wide base and lid which will reduce unwanted transfer of energy to thermal
-alot of thermal energy is used to heat the base of the pan itself which can be overcome by placing the heating element inside the water
-plastic walls and lid instead of metal as lower thermal conductivity
what are the uses of energy resources
transport, electricity generation and heating.
advantages of fossil fuels
-are reliable because they always provide energy when we need it
-fossil fuels release a great deal of energy
-are abundant and cheap
-extremely versatile
disadvantages of fossil fuels
-releases a huge amount of carbon dioxide
-non-renewable. They not being replenished as we use them
-burning fossil fuels can release other pollutants: coal:sulfur dioxide leads to acid rain which damages buildings and harm to environment
diesel:carbon particles and nitrogen oxides
