Why does the sun generally appear to rise in the east, move across the sky, and set in the west each day?
1 earth rotates on its axis
2 earth revolves around the sun
3 the sun rotates on its axis
4 the sun revolves around earth

How much work would be needed to raise the payload from the surface of the moon (i.e., x = r) to an altitude of 5r miles above the surface of the moon (i.e., x = 6r)?

Which would not reduce the amount of green house gasses in the air

An ideal polarizer with its transmission axis rotated 30 degrees to the vertical is placed in a beam of unpolarized light of intensity 10w/m^2. after passing through the polarizer, what is the intensity of the beam? a. 8.7 w/m^2 b. 7.5 w/m^2 c. 5.0 w/m^2 d. 10 w/m^2 e. 2.5 w/m^2