Question

terial. They are at or above the level of an advanced exam question. The hope is that if you can handle these problems then you should be well prepared for the exams. s 4-5 are considered challenge problems and often involve synthesis of the ma- 4. At 7:14 A.M. on June 30, 1908, a huge exsplosion occurred above remote central Siberia at latitude 61 N and longitude 102" E; the fireball thus created was the brightest flash seen by anyone before the advent of nuclear weapons. The Tnnguska Ervent which according to one change witness "covered an enormous part of the sky," was probably the explosion of a stogy asteroid about 140 m wide. (a) Considering only the Earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above Helsinki at longitudle 25' E? This would have obliterated the city. (b) If the asteroid had, instead, been a metallic asteroid, it could have reached the Earth's surface. How much later would such an asteroid have had to arrive to put the impact in the Atlantic Ocan at longitude 20 w? (the resulting tsunamis would have wiped out coastal divilization on both sides of the Atlantic.)

Answer 1