A) 20 W
B) 30 W
C) 40 W
D) 120 W
Correct Answer: B
Solution :
[b] \[\Delta T=10k\] \[P=60\text{ }W\] \[P=mS\Delta T+P'\] \[60=mS\times 10+P'\] \[120=3m\times S\times 10+P'\] \[2ms\times 10=60\] \[ms\times 10=30\] hence P' = 30You need to login to perform this action.
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