63 + 216 Ω ∅ ⁄ empedansına sahip dengeli ∆ bağlı bir yük 50∠0° Ω ∅ ⁄ empedansına sahip dengeli bağlı bir yüke parallel bağlıdır. Paralel yükler 1 + 3 Ω ∅ ⁄ empedansına sahip bir hattan beslenmektedir. bağlı yükün hattan nötr’e geliminin büyüklüğü 750 ’tur. a) Yükleri besleyen hattaki akımın büyüklüğünü hesaplayınız?
b) Hattın gönderici ucundaki faz geriliminin büyüklüğünü hesaplayınız?
c) Kaynaklar tarafından sağlanan toplam görünür, ortalama ve reaktif güçleri bulunuz?

Avolume of 2.65 m3 of air in a rigid, insulated container fitted with a paddle wheel is initially at 264 k, 5.6 bar. the air receives 432 kj by work from the paddle wheel. assuming the ideal gas model with cv = 0.71 kj/kg • k, determine for the air the amount of entropy produced, in kj/k

At steady state, air at 200 kpa, 325 k, and mass flow rate of 0.5 kg/s enters an insulated duct having differing inlet and exit cross-sectional areas. the inlet cross-sectional area is 6 cm2. at the duct exit, the pressure of the air is 100 kpa and the velocity is 250 m/s. neglecting potential energy effects and modeling air as an 1.008 kj/kg k, determine ideal gas with constant cp = (a) the velocity of the air at the inlet, in m/s. (b) the temperature of the air at the exit, in k. (c) the exit cross-sectional area, in cm2

Consider a 1.2 meter high and 2 meter wide glass window whose thickness is 6 mm and thermal conductivity is 0.78 w/m °c. the room temperature is maintained at 24 °c, while the outdoor temperature is -5 °c. the convective heat transfer coefficients on the inner and outer surfaces of the window are 10 w/m2 °c and 25 w/m2 °c respectively. (a) draw the thermal resistance network, etermine the steady rate of heat transfer t e glass window (c) determine the temperature of the inner surface of the window