Efficient use of Energy (P1a)

Physics, Heat and Gases, Age 11-14, Age 14-16

Powerpoint designed for teaching AQA Core Physics P1a: Energy and Efficiency. Includes questions using the efficiency equation; a short exercise and questions to evaluate housing insulation; and a website link to a related flashcard game.


1P1a2 : What is meant by the efficient use of energy? http://teachable.net/res.asp?r=163921. What type of energy is stored in: a) Fossil fuels
b) A stretched spring
c) A battery
d) A raised ball before it falls
e) The nuclei of uranium atoms 32. Fill in the gap in the following sentences: a) When a battery is connected to a stored chemical energy is released as light.
b) When fuels are stored chemical energy is released.

c) A piece of coal with the same dimensions as a piece of wood contains concentrated energy. 45Efficiency = Useful energy transferred by a deviceTotal energy supplied to the device61) A lamp has a power of 60 watts. It gives out light at a rate of 6 watts. a) What is the amount of energy supplied to the lamp each second in joules?
b) What is the amount of energy