An electron in a mercury atom changes from energy level b to a higher energy level when the
atom absorbs a single photon with an energy of 3.06 electronvolts.
determine the letter that identifies the energy level to which the electron jumped when the mercury
atom absorbed the photon.

Water is siphoned from a large tank and discharges into the atmosphere through a 50-mm diameter tube. the end of the tube is b = 2.1 m below the tank bottom which is a = 7.4 m deep, and viscous effects are negligible. determine the maximum height h over which the water can be siphoned without cavitation occurring. atmospheric pressure is 101.4 kpa, and the water vapor pressure is 1.79 kpa (absolute)