The opposite poles of two magnets will do which of the following?
a. attract one another
b. repel one another
c. attract or repel one another, depending on orientation
d. not interact with one another

An ideal spring has a spring constant (force constant) of 2500 n/m, is stretched 4.0 cm, how much elastic potential energy does it possess? (a) 3j (b) 0.00j (c) 1j (d) 2j (e) 4j

A2 kg ball travellng to the right with a speed of 4 m/s collidees with a 5 kg ball traveling to the left with a speed of 3 m/s. take right to be the positive direction. what is the total momentum of the two balls before they collide? what is the total momentum of the two balls after they collide?

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is