2. A bullet of mass 20g travelling at a speed of 350 m/s lodges in a wood block of mass 50kg with a specific heat consta

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2 A Bullet Of Mass 20g Travelling At A Speed Of 350 M S Lodges In A Wood Block Of Mass 50kg With A Specific Heat Consta 1 (23.21 KiB) Viewed 61 times

2. A bullet of mass 20g travelling at a speed of 350 m/s lodges in a wood block of mass 50kg with a specific heat constant, cp of 2kJ/kg K. (a) Draw a sketch of the bullet and wooden block before impact and include an appropriate system boundary to allow the average temperature rise in the block to be found. (b) Write down the generalised version of the first law of thermodynamics for a system and identify the terms that are not relevant to the system identified in (a); hence find the average rise in temperature caused by the bullet lodging in the wooden block. [Answer: 0.011°C]