A ship is heading due north at 20 km/h but is blown off course by the wind which is blowing from 30° west of south at 5 km/h: What is the speed of the ship, and in which direction is it travelling?

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

Most of the volume of an atom is occupied by the

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 = ?