I need help with physics, i didn't go to school and my teacher already teaching this ​

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

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 is the increase in density of a medium due to wave travel?