You launch a ball in the air with an initial velocity of 25 m/s. What is the velocity at the top of the arc before it starts back down?
A. 25 m/s
B. 20 m/s
C. O m/s

In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.

Abaseball is thrown from the outfield toward the catcher. when the ball reaches its highest point, which statement is true? (a)its velocity is not zero, but its acceleration is zero. (b) its velocity and its acceleration are both zero. (c) its velocity is perpendicular to its acceleration. (d) its acceleration depends on the angle at which the ball was thrown. (e) none of the above statements are true.

The electric field inside a cell membrane is 8.0mn/c. what's the force on a singly charged ion in this field?