Distinguishing between sunspots, solar flares, and prominences
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Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.

Amira pulls a 3 pound wagon 4 feet. how much work has she done?