Bonnie and Clyde are sliding 310 kg bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 435 N of force while Bonnie pulls forward on a rope with 370 N of force. What is the safe's coefficient of kinetic friction on the bank floor?

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 of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)