Anonconducting sphere contains positive charge distributed uniformly throughout its volume. which statements about the potential due to this sphere are true? all potentials are measured relative to infinity. (there may be more than one correct choice)
a) the potential is highest at the center of the sphere. b) the potential at the center of the sphere is the same as the potential at the surface. c) the potential at the surface is higher than the potential at the center. d) the potential at the center is the same as the potential at infinity. e) the potential at the center of the sphere is zero.

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 790 n/m. it is initially at rest on an inclined plane that is at an angle of 28 degrees with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is k = 0.14. in the initial position, where the spring is compressed by a distance of a = 0.18 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

Carbon-14 is a radioactive element that undergoes beta decay. which force is responsible for allowing carbon-14 to become stable? electromagnetic gravitational weak nuclear strong nuclear