Question

The height of a water spring is $50m$. The difference of temperature at the top and bottom of the spring will be

• A. ${0.117}^{o}C$
• B. ${1.17}^{o}C$
• C. ${0.437}^{o}C$
• D. ${11.7}^{o}C$

Answer 1

Answer: (A)

${0.117}^{o}C$

The energy that the water gains from the fountain is used up in heating the water.
$mgh=mc\Delta T$
i.e. $\Delta T=\frac{gh}{c}=\frac{9.8\times 50}{4200}={0.117}^{\circ }C$
Hence option A is correct.