Heat is flowing through an annular wall of inside radius r,, and outside radius r,. Thethermal conductivity varies linearly with temperature from ko at To to k, at TI. Develop an expression for the heat flow through the wall.

If the force on an object is in the negative direction, the work it does on the object must be [2 points a) negative. b) positive c) the work could be either positive or negative, depending on the direction the object moves

Light that is polarized along the vertical direction is incident on a sheet of polarizing material. only 96% of the intensity of the light passes through the sheet and strikes a second sheet of polarizing material. no light passes through the second sheet. what angle does the transmission axis of the second sheet make with the vertical?

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?