Aclimber pulls down on a rope causing his body to lift upward and rise up along the rope

The ozone hole appears in antarctica during

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?

What energy transformations occur each time the skateboarder rolls up the ramp?