How does the melting of ice caps near the north pole affect the salinity of the ocean?

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)

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?

What is friction? how does it affect the motion of an object?