During which phase of the moon may a lunar eclipse occur?

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little

Contains chemical energy. a. heat b. light c. natural gas

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?