Afirst class lever is used to lift a 500 pound load. if the input arm is 6 feet long, what is the minimum length of output arm that would allow the load to be lifted using only 125 pounds of input force

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)