If the amount of gas in a sealed container increases, what happens to the pressure in the container

Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground

What is the measure of a change in an objects velocity?

Light from two different sources are incident upon the same side of a polarizing filter. light from one source is polarized with total intensity ip, while light from the other source is unpolarized with total intensity iu. as you rotate the polarizing filter through 360 degrees, the intensity of the transmitted light on the other side varies by a factor of 9. what is the relative intensity of the initial polarized source to the unpolarized source, or ip/iu?