What happens when an electron absorbs energy?
a. the electron moves from a lower energy orbital to a higher energy orbital.
ob.
the electron falls into the nucleus.
c.
the electron moves from a higher energy orbital to a lower energy orbital.
d.
the electron loses its charge.

1. how to locate the image in converging(concave) mirror and diverging (convex) mirror with salt. 2. how to locate the image in a converging (convex) lens and diverging (concave) lens with salt.

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value