JEE Mains · Physics · STD 11 - 10.1, thermonetry,thermal expansion and calorimetry
- JEE Mains 2021
- Medium
- MCQ
The height of victoria falls is \(63\, {m}\). What is the difference in temperature of water at the top and at the bottom of fall ? (In \(^{\circ} {C}\)) [Given \(1\, {cal}=4.2\, {J}\) and specific heat of water \(\left.=1 \,{cal} \,{g}^{-1}\;{ }^{\circ}\, {C}^{-1}\right]\)
Pick an option to check your answer.
Answer & Solution
Correct Answer
(A) \(0.147\)
Step-by-step Solution
Detailed explanation
Change in \(P.E.\) \(=\) Heat energy
\({mgh}={mS} \Delta {T}\)
\(\Delta {T} =\frac{g h}{S}\)
\(=\frac{10 \times 63}{4200\, {J} / {kgC}}\)
\(=0.147^{\circ} {C}\)
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