On a new scale of temperature (which is linear) and called the W scale, the freezing and boiling points of…

On a new scale of temperature (which is linear) and called the W scale, the freezing and boiling points of water are $39^{\circ} \mathrm{W}$ and $239^{\circ} \mathrm{W}$ respectively. What will be the temperature on the new scale, corresponding to a temperature of $39^{\circ} \mathrm{C}$ on the Celsius scale?
  1. $139^{\circ} \mathrm{W}$
  2. $78^{\circ} \mathrm{W}$
  3. $117^{\circ} \mathrm{W}$
  4. $200^{\circ} \mathrm{W}$

Solution

$\begin{aligned} & \frac{39-0}{100-0}=\frac{x-39}{239-39} \\ & \Rightarrow \quad x=117^{\circ} \mathrm{W} \end{aligned}$ .

Asked in: NEET 2008 (Mains)

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