Question

A 1kg copper meteorite with an initial temperature of 70K falls from a height of 5 X 10⁸ m. If 90% of the energy from the fall stays with the meteorite after it reaches the ground, how much of the meteorite vaporizes? What does this say about meteorites landing on Earth in general?

Specific heat of copper = 387J/kg.C

Heat of Fusion of Copper Lf = 134 KJ/kg

Heat of vaporization of copper Lv = 5069 KJ/kg

Answer 1

10. Емия • Сам + то'я 5-11 мій* x ) Бхов ЭE = 79 31% т Melting point of copper = 1358k “Ромео, рік 4. «Орел е 2335к э нх 134 x to'я (1353-70) t mx 381x (2635 - 135%) + mx Sou4x102 o-x 144348 182322514 m = 0-1x742 343 5 ms o-1 х 746348 11232 599 OD 4 Ko » 18мм. Therefore, 96% of the mass of meteorites will land on Eaults - only 4% will be destroyed.