If you stood on Earth during its formation, as described in Problem 7, and watched a reg...

If you stood on Earth during its formation, as described in Problem 7, and watched a region covering 100 m2, how many impacts would you expect to see in an hour? Note that the surface area of a sphere is 4pr2. (Hint: Assume that Earth had its present radius, given in Appendix Table A-10.)

Problem 7:

Suppose that Earth grew to its present size in 1 million years through the accretion of particles averaging 100 grams each. On the average, how many particles did Earth capture per second? (Hint: See Appendix Table A-10 to find Earth’s mass.)