Laurence Jackson School

An electric heater has a power rating of 2000W. Calculate the energy transferred in 30 seconds. ... Find the energy transferred by a 15W lamp if it is switched on for 40 seconds. A hairdryer of power 1.5kW is switched on and transfers 680J of energy. How long is it switched on for? ... An electrical heater for a fish tank has a power of 2kW and ... ................
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