WBJEE · Physics · Thermal Properties of Matter
A horizontal fire hose with a nozzle of cross-sectional arca \(\frac{5}{\sqrt{21}} \times 10^{-3} \mathrm{m}^{2}\) delivers a cubic metre of water in 10 s. What will be the maximum possible increase in the temperature of water while it hits a rigid wall (neglecting the effect of gravity)?
- A \(1^{\circ} \mathrm{C}\)
- B \(0.1^{\circ} \mathrm{C}\)
- C \(10^{\circ} \mathrm{C}\)
- D \(0.01^{\circ} \mathrm{C}\)
Answer & Solution
Correct Answer
(A) \(1^{\circ} \mathrm{C}\)
Step-by-step Solution
Detailed explanation
Given, cross sectional area of nozzle \[ A=\frac{5}{\sqrt{21}} \times 10^{-3} \mathrm{m}^{2} \] and rate of heat transfer \(Q=\frac{1}{10}=10^{-1} \mathrm{m}^{3} / \mathrm{s}\) Heat transfer \(Q=A V\)…
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