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16. -2 points SerPSE10 23.4.0P.013.cbx. My Notes Ask Your Te You are working as an intern for a meteorological laboratory. You are out in the field taking measurements from a balloon that is carrying equipment designed to measure electric fields in the atmosphere. Your supervisor has asked you to determine the average volume charge density at a certain height in the air. When the balloon is at an altitude of 400 m above the ground, the electric field is measured to be 170 N/C directed downward. At 800 m above the ground, the electric field is 140 N/C downward (a) Determine the average volume charge density (in C/m*) in the layer of air between these two elevations. (Enter the magnitude.) C/m (b) Is this layer of air positively or negatively charged? O positively charged negatively charged Need Help? ReadtPlzz help

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