In a television set the power needed to operate the picture tube comes from the secondary of a transformer. the primary of the transformer is connected to a 120-v receptacle on a wall. the picture tube of the television set uses 91 w, and there is 5.5 ma of current in the secondary coil of the transformer to which the tube is connected. find the turns ratio ns/np of the transformer.

Two manned satellites approaching one another at a relative speed of 0.550 m/s intend to dock. the first has a mass of 2.50 ✕ 103 kg, and the second a mass of 7.50 ✕ 103 kg. assume that the positive direction is directed from the second satellite towards the first satellite. (a) calculate the final velocity after docking, in the frame of reference in which the first satellite was originally at rest.(b) what is the loss of kinetic energy in this inelastic collision? (c) repeat both parts, in the frame of reference in which the second satellite was originally at rest. final velocity(d) loss of kinetic energy = ?