Given: g = 6.67259 × 10−11 n m2 /kg2
a 944 kg meteor comes in from outer space and impacts on the a moon’s surface (this moon is not necessarily the earth’s moon). the mass of this moon is m = 7 × 1022 kg, and the radius of this moon is r = 1.5 × 106 m. how much work is done by the moon’s gravitational field? answer in units of j.

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?

Calculate 9 ∙ 10-5 divided by 3 ∙ 10-9. (box after the "10" in answer is for the

Objects a and b are visible in the night sky. six months later they are still visible, but object b shows less parallax than object a. which object is closer? a. a b. b c. you would need to wait another six months in order to figure this out. d. you would need to know the objects' angular diameters in order to figure this out.