Earth attracts a person with a gravitational force of 7.0 × 102 newtons. What is the magnitude of the force with which the individual attracts Earth? A.
3.0 × 102 newtons
B.
7.0 × 102 newtons
C.
8.5 × 102 newtons
D.
9.8 × 102 newtons

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s

Properties seen when one one substance changes to another are known as properties