I went ahead and put in my answer for the difference in change between primitive Earth and present Earth in the online website. My answer for the homework is wrong. Plus being a geology major, it just didn't seem right. I would have thought due to the conditions of the Earth back then, it...
I am trying to solve a physics problem involving the velocity of Earth and primitive earth. I have solved it using m1v1+m2v2=(m1+m2)v2 for inelastic equation and get a velocity of 29.65 km/s. Which I think is incorrect since the Earth's rotational velocity today is 30 km/s. But I can't figure...