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# How much energy?

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## Paul Sheffield

on 15 November 2013

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#### Transcript of How much energy?

How much energy?
L.O
How can engineers calculate energy transfered?
Specific heat capacity

Starter
what are the four ways that heat can be transferred?
what is an insulator?
Why do people get put in silver foil blankets after a marathon?
why re solar panels black?
Specific heat capacity
Heat capacities
Use the following values to calculate the energy transfered

Brass = 375
copper =385
aluminium = 897
iron = 449
water = 4200
Efficiency
The energy used by the heater can be calculated by
Voltage (v) x Current (a) x time (s)

Remember Efficiency
= Useful energy out/ total energy in
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