A NASA explorer spacecraft with a mass os 1000 kg takes off in a positive direction from a stationary asteriod if the velocity of the spacecraft is 250 m/s and the asteriod is pushed back -25 m/s, what is the mass of the asteriod?

Which graph best represents the relationship between the electric current and the rate at which a magnet is turning inside an electric generator?

Astone is thrown into a pond. what happens to the amplitude of the resulting waves as they get farther from the point where the stone hit the water? explain.

Does anyone know how to solve this problem? i really need . i made an attempt but i just cant get it. a metal rod is 25.000 cm long at 25.0 degrees celsius. when heated to 102.0 degrees celsius, it is 25.054 cm long. what is the coefficient of linear expansion for this metal.