Can anyone answer this for my friend course I am not sure of what I did I don’t take physics but I did it

What is meant by the statement" the melting poin of glycerine is 13 degree celsius

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?

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?