A 18 g lead bullet is tested by firing it into a fixed block of wood...
A 18 g lead bullet is tested by firing it into a fixed block of wood with a mass of 36 kg. The block and imbedded bullet together absorb all the heat generated. After the thermal equilibrium has been reached, the system has a temperature rise measured as 0.019 degrees celcius.
Estimate the entering speed of the bullet.
v=
Homework Answers
dT = 0.019 C.
0.5* 0.018kg* v^2 = (0.018kg* 130J/kgC+36kg* 1700J/kgC)*
0.019C.
v = 359.45m/s
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