A 500-G Lead Bullet Moving at 440 M/s Penetrates a Wood

Multiple Choice

A 5.00-g lead bullet moving at 440 m/s penetrates a wood block and comes to rest inside the block. If half of its kinetic energy goes into heating the bullet, what is the bullet's change in temperature? The specific heat of lead is 128 J/(kg·K) .

A) 94.0 K
B) 110 K
C) 126 K
D) 278 K
E) 378 K