Physics, 04.03.2021 15:10 stephanie1105
An electric heater has two power settings. One setting is 0.5 kW and the other is 1.5 kW. One kWh of electricity costs 11 pence. Calculate how much you would save if you used the heater 12 hours on the 0.5 kW setting instead of the 1.5 kW setting.
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