1.

1 Kg of water (CP = 0.5 J/KgoC) is pumped to a height of 1 m, work done by the motor is 20 J/Kg, and heat liberated by it is 5 J/Kg, what is the final temperature of water if the initial temperature was 20oC?

A. t20<sup>o</sup>C
B. t30<sup>o</sup>C
C. t40<sup>o</sup>C
D. t50<sup>o</sup>C
Answer» C. t40<sup>o</sup>C


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