Two point charges q 1 5 15.00 nc and q 2 5 23.00 nc are separated by 35.0 cm. (a) what is the electric potential at a point midway between the charges? (b) what is the potential energy of the pair of charges? what is the significance of the algebraic sign of your answer?

When fat comes in contact with sodium hydroxide, it produces soap and glycerin. determine whether this is a physical change or a chemical change. explain your answer

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.