A 400-G Lead Bullet Is Traveling at a Speed of 200

question 8

Multiple Choice

A 4.00-g lead bullet is traveling at a speed of 200 m/s when it embeds in a wood post.If we assume that half of the resultant heat energy generated remains with the bullet,what is the increase in temperature of the embedded bullet? (specific heat of lead = 0.0305 kcal/kg⋅°C,1 kcal = 4 186 J)

• A)78.3 °C
• B)157 °C
• C)313 °C
• D)39.2 °C
• E)97.9 °C

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