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Hildegarde465 Hildegarde465
  • 20-03-2014
  • Physics
Answered

It takes 56.5 kilojoules of energy to raise the temperature of 150 milliliters of water from 5°C to 95°C. If you

use an electric water heater that is 60% efficient, how many kilojoules of electrical energy will the heater

actually use by the time the water reaches its final temperature?

Verified Answer :

Anonymous Anonymous
  • 21-03-2014

You'd get an extra 40/60 of the energy, or 2/3. Multiply 5/3 by the required energy to get the actual consumption.

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