A) \[0.233{}^\circ C\]
B) \[2.33{}^\circ C\]
C) \[23.8{}^\circ C\]
D) \[233{}^\circ C\]
Correct Answer: C
Solution :
Kinetic energy = heat \[\frac{1}{2}\frac{m{{v}^{2}}}{4.2}=ms\Delta \theta \] \[\frac{1}{2}\frac{m\times 2gh}{4.2}=ms\Delta \theta \] \[\Rightarrow \] \[\frac{mgh}{4.2}=ms\Delta \theta \] \[\frac{10\times 1000}{4.2}=0.1\times 1000\times \Delta \theta \] \[\Delta \theta =23.8{}^\circ C\]
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