Aseries rc circuit contains a 0.5 microfarad capacitor and a 500 ohm resistor. the circuit is operating at a frequency of 2,000 hz. what is the impedance of the circuit?

(a) 500 ohms
(b) 809 ohms
(c) 2,006 ohms
(d) 525 ohms

The air in an automobile tire with a volume of 0.015 m3 is at 32°c and 140 kpa gage. determine the amount of air that must be added to raise the pressure to the recommended value of 206 kpa gage. assume the atmospheric pressure to be 128 kpa and the temperature and the volume to remain constant.[r-0.287 kj/kgk]