Friction is a: A. balance force
B. unbalance force
C. type of motion
D. type of direction

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

Select all the correct answers. which three statements about electromagnetic radiation are true?

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.