If you could spend a billion dollars (1 x 10 to the 9th power) per second, how many years would it take to spend one mole of dollars?

When light strikes a plane mirror, images form in locations where light does not actually reach. it only appears to the observer as though the light were coming from this position. what type of image is formed?

What does the cell nucleus do or, how does it function?

The peak wavelength for the blackbody curve of a star is in the uv range. assuming the radiation from this star can reach earth, would you be able to see it?