Charles is on his way to school which is 7 km from his house in a Westerly Direction after 1.8 kilometre rate drops is watcg but only realised it after having walked 700m he turns around to pick up his watch and then carries on walking to school again the antire walk lasts 45 minutes.​ Calculate the distance charles has walked

Agas contained within a piston-cylinder assembly undergoes three processes in series: process 12: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 23: constant pressure expansion to 1 liter. process 31: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat