Which of the following would cause the greatest decrease in gravitational force between the earth and the moon? an increase in the moon's mass
an increase in the earth's mass
an increase in the distance between the earth and the moon
a decrease in the distance between the earth and the moon

Ateam of astronauts is on a mission to land on and explore a large asteroid. in addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. with what minimum initial speed vesc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? assume that the asteroid is approximately spherical, with an average density p 3.84 x108 g/m3 and volume v 2.17 x 1012 m3 recall that the universal gravitational constant is g 6.67 x 10-11 n m2/kg2

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

The electric potential a distance r from a small charge is proportional to what power of the distance from the charge? a. r^-1 b. r c. r^-2 d. r^2