Como se hace?

How do I do it?: It says we want to put a satellite around the Earth with a period of two hours. At what height over the surface of the Earth does it have to be?

The solution is: 1,68 x 10^6 m

Arock collection comes from which part of earth?

Which best represents the law of conservation of mass ?

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present