If a negative charge and a positive charge are held close together and then released, how will the charges react ?

If the speed of a particle triples ,by what factor does its kinetic energy increase?

Amass weighing 24 pounds, attached to the end of a spring, stretches it 4 inches. initially, the mass is released from rest from a point 8 inches below the equilibrium position. find the equation of motion. (use g = 32 ft/s2 for the acceleration due to gravity.)

Use vsepr theory to predict the molecular geometry of the molecule hcn.