Achild and sled with a combined mass of 54.6 kg slide down a frictionless hill that is 8.97m high. if the sled starts from rest what is its speed at the bottom of the him?

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