1.0 x 10^4 kg spacecraft is traveling through space with a speed of 1200 m/s relative to earth. a thruster fires for 2.0 mins, excerting a continious force of 25kn on the spacecraft in a direction opposite the spacecraft's motion. calculate the initial momentum and final momentum of the space craft?

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length (in m) of a column of water 1.45 km high for a temperature increase of 1.12°c. assume the column is not free to expand sideways. as a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to