What is produced when constantly changing electric and magnetic fields cause electrically charged particles to vibrate or accelerate?
a. electromagnetic spectrum
b. magnetic fields in space
c. transverse magnetic waves
d. electromagnetic waves

Afigure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 20.9 12000 200 3.33

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.

How do i solve this physics problem?