If a balloon has 12 electrons on its surface but also 13 protons, what is the net charge on the balloon?

Aspring with a mass of 2 kg has a damping constant 14 kg/s. a force of 3.6 n is required to keep the spring stretched 0.3 m beyond its natural length. the spring is stretched 0.6 m beyond its natural length and then released. find the position of the mass at any time t. (assume that movement to the right is the positive x-direction and the spring is attached to a wall at the left end.)

What are two different ways you could find the value of a? explain these methods.

Explain what happens at the saturation point when adding salt to water at room temperature.