(multiple choice) A cannon fires a cannonball. What happens to most of the chemical energy of the explosives?
A. It transforms into kinetic energy.
B. It transforms into elastic potential energy.
C. It transforms into electrical potential energy.
D. It transforms into gravitational potential energy.

Two 1.20-m nonconducting wires meet at a right angle. one segment carries + 2.50 µc of charge distributed uniformly along its length, and the other carries - 2.50 µc distributed uniformly along it, as shown in fig. 21.50. ( a. find the magnitude and direction of the electric field these wires produce at point p, which is 60.0 cm from each wire. ( b. if an electron is released at p, what are the magnitude and direction of the net force that these wires exert on it?