1. A 670 kg meteorite happens to be composed of aluminum. When itis far from earth, its temperature is -15 degrees Celsius and itmoves with a speed of 14 km/s relative to the earth. As it crashesinto the planet, assume that the resulting additional internalenergy is shared equally between the meteor and the planet, andthat all of the material of the meteor rises momentarily to thesame final temperature. Find this temperature. Assume that thespecific heat of liquid and gaseous aluminum is 1170 J/kgC.
2. The inside of a hollow cylinder is maintained at a temperature(Ta) while the outside is at a lower temperature (Tb). The wall ofthe cylinder has a thermal conductivity k. Ignoring end effectsshow the rate of energy conduction from the inner to the outersurface in the radial direction is:
dQ/dt =( 2(3.14)(L)(k)) (Ta-Tb/ln(b/a))
1. A 670 kg meteorite happens to be composed of aluminum. When itis far from earth, its temperature is -15 degrees Celsius and itmoves with a speed of 14 km/s relative to the earth. As it crashesinto the planet, assume that the resulting additional internalenergy is shared equally between the meteor and the planet, andthat all of the material of the meteor rises momentarily to thesame final temperature. Find this temperature. Assume that thespecific heat of liquid and gaseous aluminum is 1170 J/kgC.
2. The inside of a hollow cylinder is maintained at a temperature(Ta) while the outside is at a lower temperature (Tb). The wall ofthe cylinder has a thermal conductivity k. Ignoring end effectsshow the rate of energy conduction from the inner to the outersurface in the radial direction is:
dQ/dt =( 2(3.14)(L)(k)) (Ta-Tb/ln(b/a))
