Which of the following units is used to express electrical charge?

A: Newton
B: Coulomb
C: Joule

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Match these items. 1. coulombs __force 2. ohms __emf 3. centimeters __resistance 4. newtons __charge 5. volts __length

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9