Based on the magnetic field lines shown, what is the orientation of the mystery magnet? S N Mystery

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?

Select the three ways that the parallel-plate capacitor differs from a car battery.