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

Initial state the pressure and volume are

P = 1 bar

V = 1 litre

Now the process equation is given as

PV = constant

So now the pressure is increased to

P = 4 bar

so volume must decrease by 4 times

so final volume is

V = 0.25 litre

Now the pressure is constant and volume again increased to V = 1 litre

Now in final step the volume will become constant and again pressure will become P = 1 bar

so this is a cyclic process and figure is attached at following

they should be similar or the same

a.metals can become magnetic if they have many spinning electrons that create magnetic fields.d.only some metals are attracted by magnets; these metals are called ferromagnetic.

d.wrapping an insulated wire around a metal with ferromagnetic properties and applying an electric current.