A. 4.28 kg
B. 42.86 kg
C. 1.02 kg
D. 7.14 kg
Correct Answer:
Option C = 1.02 kg
Explanation
Energy supplied bythe heater = heater gained by water
pt = MCAθ
1000 x 300 = m x 4200(100 – 30)
m = (1000 x 300)/4200 x 70 = 1.02 kg
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