An electric kettle has an efficiency of 76%. 2500 j of energy is transferred
from the mains to...
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Physics, 21.10.2019 23:00 ddaaaeeee2960
An electric kettle has an efficiency of 76%. 2500 j of energy is transferred
from the mains to the kettle every second. when the kettle is full, it needs to
transfer 418 000 j of energy to the thermal energy store of the water to boil it.
calculate how long a full kettle needs to be switched on for in order to boil the water.
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Answers: 1
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