First slide

Specific heat

Question

The height of a water spring is 50 m. The difference of temperature between the top and bottom of the spring is

Moderate

A

0.245°C
B

0.117°C
C

0.562°C
D

0.196°C

Solution

The difference of temperature is
$\begin{array}{l} \frac{mgh}{J} = msΔθ \\ Δθ = \frac{gh}{Js} = \frac{9 .8 \times 50}{4 .2 \times 10^{3}} = 0 {.117}^{\circ} C \end{array}$

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