Question

how much heat energy is produced by an electric heater of 1 kilowatt power in 5 minutes​

Answer 1

Answer:

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Explanation:

Power of heater P=5 kW=5000 W=5000

s

J

Time of operation t=15 min=15×60=900 s

Thus energy spent E=Pt=5000×

s

J

×900 s=4.5×10

6

J

Answer 2

Power of heater = 1 Kilowatt = 1000 watt

Time of operation = 5 minutes = 300 seconds

= Energy spent

= Power x Time

= 1000 x 300

= 300000

$= 3 \times {10}^{5} \: answer$