An airplane is moving to the south with a speed of 110 m/s while maintaining a constant altitude. It continues moving in this direction at this speed for 16 seconds. During this time, what is the direction of the net force exerted on the airplane

What’s #16 asking and how do i solve it?

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)

See the attachment and solve question 5th