What are the units of energy?
The battery in a torch has 20J of chemical energy store when it is full. 5J is transferred from the battery. How much is left?
There are 5000J in the chemical energy store of a crisp. In a bag of crisps there are 30 crisps.
How big is the chemical of energy store of an entire bag of crisps?
There are 5000J in the chemical energy store of a crisp. In a bag of crisps there are 30 crisps.
How big is the chemical of energy store of 3 bags of crisps?
A new match has 800J in its chemical energy store. It is lit and allowed to burn.
How much energy has been transferred from the match when one quarter of it has been burned?
What happens to the chemical energy store within a fuel as it is used?
Some athletes will eat/drink a sachet of sugary gel during a long-distance running race. Why might they do this?
'Energy does not cause things to happen but gives a limit as to how much can happen'.
Explain what this sentence means.