If a piece of cork has a mass of 24g and a density of 6g/cm3.what is the volume of the piece of cork

Two identical small charged spheres are a certain distance apart, and each one initially experiences an electrostatic force of magnitude f due to the other. with time, charge gradually leaks off of both spheres. when each of the spheres has lost half its initial charge, the magnitude of the electrostatic force will be

During which interval are the persons represented by the graph not moving? a) 0 to 0.5 hrs b) 1.5 to 2 hrs c) 2 to 2.5 hrs d) 4.5 to 5 hrs

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up