What is the innermost layer of the sun’s atmosphere called?

Find the dimensions and area of the largest rectangle that can be inscribed in the upper half of the ellipse. (give your answers in terms of a and b. enter the dimensions as a comma-separated list.)

Why does lightning travel from clouds to the ground?

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?