Physics > 2000 > 40
WASSCE
An immersion heater is rated 120W. how long does it take the heater to raise the temperature of 1.2kg of water by 15∘C.[Assuming heat lost to the surrounding is negligble specific heat capacity of water = 4200Jkg-1K-1]
A.
65.0 minutes
B.
60.0 minutes
C.
52.5 minutes
D.
10.5 minutes
Answer: D
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