mombasa

Thanks guys. One more thing. Whats the formula for calculating gravity?

If you add the rest of the earth's material, i.e. cars, buildings and so forth, will this not amount to quite a bit?

Well, is 7 Billion people a small fraction? What exactly is the earth's weigth?

Hi all, This might seem a silly question to you all, but what exactly determines the mass of an object, specifically the earth? Does the earth's mass include ALL its contents, i.e. does a new born baby contribute to the earth's overall mass? What about plants, cars, buildings etc. Are they all included?