What is the average speed in the last 1s?

With Explanation Please

Agas initially at p1 = 1 bar and occupying a volume of 0.5 liter is compressed within a piston–cylinder assembly to a final pressure p2 = 4 bar. (a) if the relationship between pressure and volume during the compression is pv = constant, determine the volume, in liters, at a pressure of 3 bar. (b) repeat for a linear pressure–volume relationship between the same end states. reference

Need asap ‼️ 20 pts which gravitational force field diagram is drawn correctly? (answers in pictures below)

Explain what happens at the saturation point when adding salt to water at room temperature.