As a ball falls freely toward the ground, its total

mechanical energy

(1) decreases

(2) increases

(3) remains the same

9. A bolt of lightning transfers 28 coulombs of charge through an electric potential difference of 3.2 x 107 volts between a cloud and the ground in 1.5 x 10-3 second.

The block exerts a force F on the dart that is proportional to the dart's velocity v and in the opposite direction, that is F = - bv, where b is a constant.

What is the process that occurs when water vapor is cooled and changes from a gas to a liquid

Which of the following materials is brittle? wood metal ceramic plastic

Why don't satellites in orbit fall to the ground? Why don't they fly off into space?

If a ball is thrown at some angle to the ground other than 90 degrees, and has a total flight time of 9.3s, to what height did it rise?

An electron is held at a distance from a stationary, positively charged object. If the electron is released, what energy change will take place?

What is the advantage of a free market economy?

In a Little League baseball game, the 145 g ball enters the strike zone with a speed of 15.0 m/s. The batter hits the ball, and it leaves his bat with a speed of 21.0 m/s in exactly the opposite direction.

An astronaut released hooks holding two spacecrafts together and the 68,000 kg shuttle pushed away from the space station with the aid of four large springs. If the 73,000 kg space station moved back at a speed of 0.