Help Me With My Homework Please

Aknife blade is a(n) a. lever b. screw c. wedge d. inclined plane

What are chlorofluorocarbons and what impact do they have on the atmosphere?

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