Ared object, such as an apple, is seen as red because:

a. the apple is reflecting red light. < i think this one? but im probably wrong
b. the apple is absorbing red light.

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

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.

If the textbook weighs 19.6 newtons on venus,what is the strength of gravity on venus?