Why is the study of comets, asteroids, and meteoroids important in understanding the formation of the solar system?

A parallel plate capacitor has two plates has a separation d. If I charge it with a + Q and a? Q on the two plates, respectively, what is the electrostatic energy? What is it if I move to 1/2 d?

What is the mechanical advantage of the screw shown below?

Hat is the kinetic energy of a 1.0-kg billiard ball that moves at 5.0 m/s? A. 5.0 J B. 6.5 J C. 10.0 J D. 12.5 J

When a ball is dropped it bounces until it eventually stops why does this happen A) some of the balls energy is lost B) some of the balls energy is converted to other forms such as thermal and sound C) all of the balls energy is eventually converted

Which of the following solids will have the smallest linear expansion when temperature increases? a. aluminum b. glass c. concrete d. copper

A 5.00*105-kg subway train is brought to a stop from a speed of 0.500 m/s in 0.400 m by a large spring bumper at the end of its track. what is the force constant k of the spring

A moving object always has energy in its?

What is the volume of a box that is 12 cm long, 2 cm wide, and 3 cm high?

Suppose a child drives a bumper car head on into the side rail, which exerts a force of 4000 N on the car for 0.200 s. (a) What impulse is imparted by this force?

If a soundproof door is almost shut but still leaves a small opening, what wave phenomenon is responsible for someone being able to hear sound from the room while standing by the wall to the side of the opening?