Amodel air rocket with a mass of 50.g is free to travel along a horizontal track. it begins from rest. after 2.0s, the rocket has lost 10% of its mass by expelling air at an average velocity of 53.m⋅s−1. what is the velocity of the rocket at that moment

Which statement is true for light passing into a medium that is more optically dense than the first medium through which it past

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 = ?

Which of the following is not an appropriate unit for acceleration? (kg/12 mihr? m/min/sec cm/30c?