500g of water is heated so that its temperature rises from 30°C to 72°C in 7 minutes. calculate the supplied per minute. (Specific heat capacity of water is 4200J(kg^{-1}K^{-1})
-
A.
9000J -
B.
12600J -
C.
21000J -
D.
25200J -
E.
88200J
Correct Answer: Option B
Explanation
(frac{Q}{t} = frac{0.5times4200times(72-30)}{7}=12600J)