The visible spectrum of the electromagnetic spectrum is made up of which of the following?
a. infrared light
b. black light
c. red, orange, yellow, green, blue, and violet light
d. ultraviolet light

Consider the following problem: a box with an open top is to be constructed from a square piece of cardboard, 3 ft wide, by cutting out a square from each of the four corners and bending up the sides. find the largest volume that such a box can have.

What are two different ways you could find the value of a? explain these methods.

Point charges q1 = 51 µc and q2 = −27 µc are placed 1.0 m apart, with q2 on the right. what is the force (in n) on a third charge q3 = 19 µc placed midway between q1 and q2? (assume the positive direction is to the right. indicate the direction with the sign of your answer.)