A15-gram bullet moving at 1502 m/s plunges into 2.5 kg of paraffin wax. the wax was initially at 31°c. assuming that all the bullet's energy heats the wax, what is its final temperature (in ºc)? take the mechanical equivalent of heat to be 4 j/cal and the specific heat of wax to be 0.7 cal/g °c

33.4°C .

Explanation:

mass of bullet, m = 15 g = 0.015 kg

velocity of bullet, v = 1502 m/s

mass of wax, M = 2.5 kg

Initial temperature of wax, T1 = 31°C

Let T2 be the final temperature of wax.

Specific heat of wax, c = 0.7 cal/g°C = 0.7 x 1000 x 4 J/kg°C = 2800 J/kg°C

The kinetic energy of the bullet is converted into heat energy which is used to heat the wax.

thus, the final temperature of wax is 33.4°C .

for this one it would be d bump/forearm pass

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