Two positively-charged balls with equal amount of charge and mass m = 3.5 g are suspended from the ceiling by a thread of length L = 1.4 m as shown in the drawing. If each thread makes an angle = 9.5 degrees with respect to the vertical direction, what is the magnitude of the charge q on each ball in microcoulombs?

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 = ?