When do you start to pair up the electron dots after the first pair is done

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

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.

How will the system respond to a temperature increase?