A metal cube with a negative charge -2Q−2Qminus, 2, Q is brought into contact with a cylinder of a negative charge -Q−Qminus, Q.

What is the length x of the side of the triangle below? (hint: use the cosine function)

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

What is a costume plot? why is it important to a film or theater production?