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A balloon has a negative charge. Describe the relationship between the number of protons and the number of electrons. (p+ > e-, p+ < e-, p+ = e-)
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Earth has a mass of 5.97 x 1024kg, and a mean radius of 6.38 x 106m. what would be the orbital speed and period of a satellite in orbit 1.44 x 108 m above earth?
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