¿CUÁNTO ES EL NÚMERO DE MASA DE UN ÁTOMO QUE TIENE 45 NEUTRONES Y 12 ELECTRONES?

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

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island