Problem 22 in Gilat. (2 points)
22. The voltage V c t seconds after closing the switch
in the circuit shown is given by:
Ve=V (1-e4/RC)
Plot V c as a function of t for 0 axes. V. = 36 V, R = 2, 500 12, and C = 1, 200 uF.
CLV
Tips: 1. Use t = [0:0.01:15]
2. 1 uF = 1.0e-6 F
Matlab

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

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