ASTR 1101 Chapter : CW16
Document Summary
Classwork #16! (1) the moon(cid:2)s surface is lled with craters-on-craters, while our. But both bodies are hit by meteors and asteroids at the same rate. Its velocity of impact would be 50 km/s = 50,000 m/s. The density of the icy comet is around 1 gm/cc = 1,000 kg/m3! Approximate the nucleus as a cube of l = 10 km = 10,000 m, so volume=l3! Assume a (cid:1)slow(cid:2) velocity of 10 km/s = 10,000 m/s. The density of the iron meteor fragments is around 8 gm/cc = 8,000 kg/m3! Approximate the meteor as a cube of side (cid:1)l(cid:3), so volume=l3! Ke = kinetic energy = energy from motion [joule]! m = mass of body [kg] = volume*density! Hiroshima = 6x1013 j = 15 kilotons of tnt! Krakatoa = 4x1020 j = 100 megatons of tnt! All nuclear arsenals = 4x1022 j = 10 gigatons of tnt! This erosion can be from wind, water, and earthquakes.
