Describe searle's method of determination of thermal conductivity of a good conductor ?​

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?

The substances that are necessary for producing of certain hormones and that store and transport vitamins

Is a copper wire a conductor or insulator?