How much energy is stored by the electric field between two square plates, 9.5cm on a side, separated by a 2.5-mm air gap? The charges on the plates are equal and opposite and of magnitude 13nC . Express your answer using two significant figures and include the appropriate units.

An ideal otto cycle has a compression ratio of 8. at the beginning of the compression process, air is at 95 kpa and 27°c, and 750 kj/kg of heat is transferred to air during the constant-volume heat-addition process. assuming constant specific heats at room temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. (4390 kpa, 1730 k; 423 kj/kg; 56.4%; 534 kpa)