Where would the image be located for an object placed 20 cm, along the principal axis, from a double convex lens with a focal length of 10 cm? Is the image upright or inverted?

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

Ineed the answer to question 1 , i’m desperate

If the new moon happens on january 15th, what shape will it be on february 6th?