Two teams are pulling on a tug-of-war rope. the rope is not moving. is this an example of a balanced force or an unbalanced force?

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?

Which best describes the difference between internal and thermal energy?

The inverse square law applies to: intensity of sound gravitational force intensity of light electric force magnetic force