A cart rolling down an incline for 5 seconds has an acceleration of 4 m/s2. If the cart has an initial velocity of 2 m/s, what is its final velocity? (select the correct equation)

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