Take the Mechanical Equivalent of Heat as 4 J/cal $\degree$ C) the Wax Was Initially at 20

Multiple Choice

Take the mechanical equivalent of heat as 4 J/cal. A 10-gram bullet moving at 2000 m/s plunges into 1 kg of paraffin wax (specific heat 0.7 cal/g. $\degree$ C) . The wax was initially at 20 $\degree$ C. Assuming that all the bullet's energy heats the wax, its final temperature ( $\degree$ C) is:

A) 20.14
B) 23.5
C) 20.006
D) 27.1
E) 30.23