A 6-g lead bullet traveling in 20$\degree$C air at 300 m/s strikes a flat steel plate and stops. What is the final temperature of the lead bullet? (Assume the bullet retains all heat.) The melting point of lead is 327$\degree$C. The specific heat of lead is 0.128 J/g·$\degree$C. The heat of fusion of lead is 24.5 J/g.

Question

Quizplus · Accepted Answer

The kinetic energy of the bullet is converted into heat, which raises its temperature. The energy is sufficient to raise the temperature to the melting point of lead, 327°C, but not enough to melt it.

A 6-G Lead Bullet Traveling in 20 °\degree° C Air at 300 M/s Strikes a Flat Steel Plate

A 6-G Lead Bullet Traveling in 20 $\degree$ C Air at 300 M/s Strikes a Flat Steel Plate