A 0.10-kg ball traveling at 10 m/s hits a stationary wall and rebounds back with a velocity of 10 m/s. What is the impulse imparted by the wall?

If it takes a planet 2.8 x 10^8 s to orbit a star with a mass of 6.2 x 10^30 kg what is the average distance between the planet and the star

What is special about a dc circuit ?

Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?