An object that is accelerating may be a- slowing down b- gaining speed c- changing direction d- all of the above !

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

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

How do you tell if someone actually cares about you? and just say they do?