PH-869
Power
Physics · Secondary 3 · Medium · Power
A 1500 W heater is used to boil water. In 80 s, 9.0 × 10^4 J of energy is transferred to the water. What percentage of the electrical energy supplied is lost to the surroundings?
- 25 %
- 75 %
- 20 %
- 5.0 %
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