The power supplied by the boiler to heat the house is 25000 Watts(W) or 25 Kilowatts (KW).
Power is the rate of doing work. It is the energy supplied to the body per unit of time. It is of two types, instantaneous power which is calculated for a particular instant, and average power which is calculated over an interval of time Its S.I. unit is watts (W).
One watt is equal to one joule of energy transfered per second.
Given in the question
Energy transferred = 15 MJ
Time interval = 10 minutes
Before calculating the power, We need to convert the given values into their S.I. unit
1MJ = 1000000 J
So 15 MJ = 15 × 1000000 J
15 MJ = 15000000 J
Similarly, 1 minute = 60 seconds
So 10 minutes = 10 × 60 seconds
10 minutes = 600 seconds
Now,
Power = Energy transferred/ Time Interval
Power = 15000000 / 600
Power = 150000/6
Power = 25000 Watts or W
Power = 25 kilowatts or KW
Therefore, the power supplied by the boiler to heat the house is 25000 Watts(W) or 25 Kilowatts (KW).
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