English National Curriculum - Science Science
Mission Objectives
Recall the two equations for calculating power and the units involved
Describe, using examples, what is meant by power
Calculate power using energy transferred or work done
Compare the power of different appliances or machines
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Words and meanings to learn
transfer
the conversion of one form of energy into another, or the movement of energy from one place to another
megajoule (MJ)
a unit of work or energy, equal to one million joules
kilowatt (kW)
a unit of power. 1 kW is equal to 1000 watts
conversion
a change between different units of measurement for the same quantity
rearrange
change the subject of an equation. When using equations whatever is done to one side of an equals sign must be done to the other also.
Resources: Class presentation and handout.
Handout: Information on James Watt for historical context. Definition of power and model calculation. Practice calculation for power, including changing units and the subject of the equation. Practice converting SI units.
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