Can someone please help me with these three problems ASAP .. I have to get it done right now.. I have to get it done... I'm not playing no games

Asample of a gaseous substance changes into a liquid

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?

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?