What is phanerogam? mention it's two group

What happens in a global convection cell

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of

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