A14.8-g piece of styrofoam carries a net charge of -0.742 µc and is suspended in equilibrium above the center of a large, horizontal sheet of plastic that has a uniform charge density on its surface. what is the charge per unit area on the plastic sheet?

What is meant by the statement" the melting poin of glycerine is 13 degree celsius

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.