Which of the following is the name of the process scientists use to gain knowledge abut the physical world

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

What are similarities and differences of reflection, refraction, diffraction and absorption?

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?