Magnetostatic fields have no divergence anywhere in space, but have a set of points with nonzero curl. What does this imply about the behavior of field lines for a magnetostatic field

Astudent wears sunglasses to her read a book more easily which wave interaction occurs as light passes from the air into the plastic lenses? a polarization b.refraction c.diffraction d. interference

If the spring constant k of a pogo stick is 3500 n m and the weight of the person on the pogo stick is 700 n, how much is the spring in the botom of the pogo stick compressed?

What is a costume plot? why is it important to a film or theater production?