NEET UG PHYSICS MCQ: THERMODYNAMICS

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Application +4 | -1

A lead bullet of 10 g travelling at

300\,m/s

strikes against a block of wood and comes to rest. Assuming

50\%

of heat is absorbed by the bullet, the increase in its temperature is (specific heat of lead

= 150J/kg,K)

View answer and explanation

Correct option: C

{150^0}C

The kinetic energy of the bullet is converted into heat. Half of this heat is absorbed by the bullet, causing its temperature to rise. Using the formula

Q = mc\Delta T

, we find the temperature increase to be 150°C.

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4^{\circ} \mathrm{C}

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