Question

Water falls from a height of $210m$. Assuming whole of energy due to fall is converted into heat the rise in temperature of water would be
($J=4.3$ Joule/cal)

• A. ${42}^{0}C$
• B. ${49}^{0}C$
• C. ${0.49}^{0}C$
• D. ${4.9}^{0}C$

Answer 1

The correct option is C ${0.49}^{0}C$

$\begin{array}{c}\Delta \theta =0.0023h\\ =0.0023\times 210\\ ={0.483}^{0}C\\ =\approx {0.49}^{0}C\end{array}$

Hence, Option $C$ is correct.