What is the gravitational potential energy of a 20kg object at a height of 50 m?

Balloon a has charge q, and identical mass balloon b has charge 10q. you hang them from threads near each other. choose all of the statements with which you agree. check all that apply. a. a and b exert the same magnitude forces on each other. b. the force that a exerts on b is 10 times the force that b exerts on a. c. the angle between the thread supporting a and the vertical is < the angle between the thread supporting b and the vertical. d. the force that a exerts on b is 1/10 the force that b exerts on a.

Observations show that interstellar clouds can have almost any shape and

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration