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# A 0.058 kg aluminum bullet traveling at 489 m/s strikes an

### Resolved Question:

A 0.058 kg aluminum bullet traveling at 489 m/s strikes an armor plate and comes to a stop. If all its energy is converted to heat that is absorbed by the bullet, what is the bullet's temperature change in degrees Celsius?
Submitted: 3 years ago.
Category: General
Expert:  Martin replied 3 years ago.

I will work on that and come back to you.
Expert:  Martin replied 3 years ago.
We first need to find the kinetic energy in the bullet just before the impact.

Q = (1/2)*mvˆ2 = 0.5 * 0.058 * 489ˆ2 = 6934.5 Joule

Specific heat (c) of aluminum is 900 J(Kg*degree_Celcius)

The temperature delta = Q/(mc) = 6934/(0.058*900) = 132.84 Celcius.
Martin, Engineer
Category: General
Satisfied Customers: 4205
Experience: i'm 41 and i never stopped studying and experimenting

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