Chemistry · 2021
JEE Main · 4 August 2021, Shift 1 · Q53
A lead bullet weighing 18 g and travelling with a velocity of 500 m / s^-1 is embedded in a wooden block weighing 1 kg. If both the block and the…
A lead bullet weighing $\displaystyle 18$ g and travelling with a velocity of $\displaystyle 500 \mathrm{~m} / \mathrm{s}^{-1}$ is embedded in a wooden block weighing $\displaystyle 1$ kg . If both the block and the bullet were initially at $\displaystyle 25^{\circ} \mathrm{C}$, the final temperature of the block containing the bullet is \_\_\_\_ °C. (Nearest integer)
[Assume no heat is lost to the surroundings, heat capacity of wood and lead are $\displaystyle 0.5 \mathrm{kcal} \mathrm{kg}^{-1} \mathrm{~K}^{-1}, 0.03 \mathrm{kcal} \mathrm{kg}^{-1} \mathrm{~K}^{-1}$ respectively.]
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