Refrigerant-134a at 1 mpa and 90°c is to be cooled to 1 mpa and 30°c in a condenser by air. the air enters at 100 kpa and 27°c with a volume flow rate of 660 m3/min and leaves at 95 kpa and 60°c. determine the mass flow rate of the refrigerant. the gas constant of air is 0.287 kpa·m3/kg·k. the constant pressure specific heat of air is cp

Which lists the pairs of plates in order from least to greatest in terms of the work done to move the electron?

Research and discuss the aurora borealis in terms of electric charges, magnetic fields, and forces. which times of the year are best for seeing the northern lights, and where are the best places to view them? explain your answers. also identify links to good images. if you’ve ever seen the aurora borealis, describe your experience and note the time and place that you saw it.

The compound cyanogen (cn), has covalent bonds shown in this diagram how many electrons are shared between one nitrogen atom and one carbon atom? nec-cen o two o three o six o seven mark this and retum save and exit next submit 10o e a