The distribution of the mass of the milky way galaxy is determined by:

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

What is the magnitude of the gravitational force acting on the earth due to the sun?