11. A U-tube pressure gauge containing water is connected to a gas cylinder. If the difference between the levels of water in the gauge is 20m, find the pressure of the gas in Pa, if the atmospheric pressure at the time of taking the reading is 760mmHg (g=9.8ms).​

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