How many excess electrons must be added to an isolated spherical conductor 31.0 cm in diameter to produce an electric field of magnitude 1050 n/c just outside the surface? vax 1.678 1010

Aclarinetist, setting out for a performance, grabs his 3.350 kg clarinet case (including the clarinet) from the top of the piano and carries it through the air with an upward force of 24.65 n. find the case's vertical acceleration. indicate an upward acceleration as positive and a downward one as negative.