A boy weighs 322N and sits 2.8 m from the fulcrum of a balanced seesaw. The girl, on the opposite side of the fulcrum, sits 3.1 m from the fulcrum. What is the girl’s weight in Newtons?

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