10 kg of r-134a fill a 1.115-m3 rigid container at an initial temperature of –30°c. the container is then heated until the pressure is 200 kpa. determine the final temperature and the initial pressure. use data from the steam tables.

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?

The air in an automobile tire with a volume of 2.60 ft3 is at 70°f and 21 psig. determine the amount of air that must be added to raise the pressure to the recommended value of 30 psig. assume the atmospheric pressure to be 14.6 psia and the temperature and the volume to remain constant. the gas constant of air is ru = 53.34ft⋅lbflbm⋅r(1 psia144 lbf/ft2) = 0.3704 psia⋅ft3lbm⋅r the amount of air that must be added to raise the pressure is lbm

Of is j/kg·k. if a 2.6 kg of isk to k,is ?