In the mirror diagram shown, which is the normal?
oА
оB
оC
oD

Which material produces static charge when rubbed?

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

25pts the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?