Will plane flat mirror will make a real or virtual image? real virtual

Rank the torques on the five doors shown in the figure above from least to greatest. note that the magnitude of all the forces is the same

The a metal retainer that keeps the rolling elements evenly spaced. n a. seal n b. separator n c. bearing n d outer race

Imagine you had to physically add electrons, one at a time, to a previously neutral conductor. you add one electron very easily, but the second electron requires more work. in your initial post to the discussion, explain why this is. also, what happens to the work needed to add the third, fourth, fifth, and subsequent electrons