Uniformly charged surfaces a flexible surface is suspended, held taut, and a charge of ? coulombs per square meter is uniformly distributed on the surface. the electric field strength above and below the charged mernbrane is 1.201x 10° n/c. now, the charged membrane is applied to a flat metal surface. assume none of the charge contained in the membrane is transferred to the metal, and calculate the electric field above the metal surface o a. 0.00 x 10 n/c o b. 6.00 x 101 n/c ° c. 1.20 x 10° n/c ? d. 240 x 10° n/c

Herbivores, carnivores, and omnivores are all types a. decomposers b. producers c. consumers d. biomes

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

4r-134a enters the condenser of a residential heat pump at 800 kpa and 50°c at a rate of 0.022 kg/s and leaves at 750 kpa subcooled by 3°c. the refrigerant enters the compressor at 200 kpa superheated by 4°c determine (a) the isentropic efficiency of the compressor, (b) the rate of heat supplied to the heated room, and (c) the cop of the heat pump. also, determine (d) the cop and rate of heat supplied to the heated room if this heat pump operated on the ideal vapor-compression cycle between the pressure limits of 200 and 800 kpa. (0.757, 4.37 kw, 5.12, 6.18, 3.91 kw)