How does a parachute change the terminal velocity of a skydiver?
a. it will increase her terminal velocity.
b. it will decrease her terminal velocity.
c. it will reduce her terminal velocity to zero.
d. it will change the direction of her terminal velocity.

What is the momentum of a 2 kg object moving at 15 meters per second

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.15 times a second. a tack is stuck in the tire at a distance of 0.373 m from the rotation axis. noting that for every rotation the tack travels one circumference (a) find the tack's tangential speed. (b) what is the tacks radial acceleration?