9. the bottle and cup look empty, but they are not. explain why.
physical science
10. what is the original source of energy used to turn a water wheel? !
11. soon after a burning candle is covered with an upside down glass, the flame goes out. why?

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

hope this ! this is not copied! search it up, it's free of plagiarism!

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray