The oldest rocks found on the Earth's surface date back about ________ billion years
A) one
B) two
C) three
D) four
E) four and a half
D
Physics & Space Science
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Indicate whether the statement is true or false
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Planet Roton has a mass of 4.0 × 10^23 kg and a radius of 2.0 × 10^6 m. With what speed should a space probe be launched from the surface of Roton so as to achieve a maximum distance of 3.0 × 10^6 m from the center of Roton?
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