Physics > 2008 > 21
WASSCE
Water mass 1.5kg is heated from 30°C to 80°C using an electric kettle which is rated 5A, 230V. Calculate the time taken to reach the final temperature.
[Specific heat capacity of water = 4200 Jkg-1K-1]
[Specific heat capacity of water = 4200 Jkg-1K-1]
A.
4.57 minutes
B.
5.02 minutes
C.
7.30 minutes
D.
10.04 minutes
Answer: A
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