What is the molecular mass of a gas if C, =1915 J/kgK. Cr = 1.50 KJ/kgK and universal gas constant 8.314 KJ/kmolK? Select one: O a. 30 O b. 15 O .20 O d. 25
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- The pressure in automobile tire depends on the temperature of the air in the tire. When the air temperature is 30°C, the pressure gage reads 250KP.. The volume of the tire is 0.030 m'and the atmospheric pressure is 100KP.. The gas constant of the air is 0.287 KPa.m2/Kg.K. The gage pressure in the tire when the air temperature rises to 60 °C is Select one: O a. 2209 KPa Ob.285.25 KPa Oc305.8 KPa Od 274.75 KPaIn Figure below all fluids are at 20 deg.C. Determine pressure at point B, if pressure at point A is 150 kPa and weight of air is neglected. Use the table below for the densities at 20 deg.C. Liquid p. kg/m Kerosene - Ammonia 608 Benzene 881 Air Carbon tetrachloride 1590 Benzene Ethanol 789 Ethylene glycol Freon 12 B 1117 40 cm 9 cm 1327 20 cm Gasoline 680 14 cm Glycerin Kerosene 1260 t8 cm 804 Mercury- Water Mercury Methanol 13,550 791 SAE 10W oil 870 SAE 10W30 oil 876 SAE 30W oil 891 SAE 50W oil 902 Water 998 Seawater (30%e) 1025piston, on which rests a weight. . A gas is confined in a 1.25(ft) diameter cylinder by a The mass of the piston and weight together is 250(lb.m). The local acceleration of grav- ity is 32.169(ft)(s)-, and atmospheric pressure is 30.12(in Hg). (a) What is the force in (lbf) exerted on the gas by the atmosphere, the piston, and the weight, assuming no friction between the piston and cylinder? (b) What is the pressure of the gas in (psia)? (c) If the gas in the cylinder is heated, it expands, pushing the piston and weight upward. If the piston and weight are raised 1.7(ft), what is the work done by the gas in (ft)(lbf)? What is the change in potential energy of the piston and weight? 7SLL mALH B 60 N pe 0UG V Cl 1P0 DUG 0t
- A closed vessel contains air at a pressure of 140 kPag and a temperature of 20°C. Find the final absolute pressure in KPA if the air is heated at a constant volume to 100°C. The atmospheric pressure is 28 in. Hg. a. 298.93 b. 300.93 c. 278.93 d. 288.93Air tank filled with air (air gas constant 287 J/kg.K, density of 1.2 kg/m), the air temperature is 20 C Find the force F (N). The oll specific gravity S- 0.8. Neglect the weights of the piston. 10-cm diameter Vertical 2m Oil air -2.2 mH.w 3: / carbon dioxide (CO2) has mass (4.2kg) pressure (12 bar) and of If (R temperature (92 0.189 kJ/kg. K)? °C).Calculate the volume %3D
- 3 24. A volume of 450 cm' of air is measured at a pressure of 740 mm Hg absolute and a 3 temperature of 20°C. What is the volume in cm' at 760mmHg absolute and 7°C?A certain gas at 30 degrees C is subjected to a pressure of 200kPa abs. if it has a volume 35 L, compute the mass of this gas. Use gas constant. R=210 N-m/kg-“K.a. 0.11kg c.0.97kgb. 0.23kg d.1.12kgASAP Pls dont round off initial values, round off final ans only ty The pressure 24 meter below a liquid is 786.41 kPa, determine its mass density (kg/m³).
- P1.) A closed cylindrical tank 1.5 m in diameter and 4 m long is completely filled with gasoline (sp.gr. = 0.82) and accelerated horizontally at 3 m/s². Find the total force acting at the rear wall and at the front wall of the tank. Find also the accelerating force on the fluid mass. Answer: 10.66 kN and F = 17.36 kN Subject: Fluid Mechanic Lesson: Relative Equilibrium of Liquids Fundamentals of Fluid FlowA gas filled in a piston-cylinder arrangement as shown in Figure 1 has a volume of 0.09 m³ at its initial equilibrium state. The gas is slowly heated through the bottom of the cylinder that allowed for the gas to expand at constant-pressure of 2095 kPa to a volume of 1.23 m°. The change in internal energy of the gas is 0.24 kJ. Ignoring the friction between the piston and the cylinder and assuming the atmospheric pressure any value from 90 to 110 kPa, of (a) Calculate the mass of the piston if the area of the piston is 0.047 m2 (b) For the gas as a system, evaluate work and heat transfer, each in kJ (c) For the piston as a system, evaluate work and change in potential energy, each in kJ Piston Gasnone m_cv2-m_cv1=m_in-m_out For ideal gases, .. is a function of temperature only specific volume none pressure density internal energy The quality of the fluid is 20%. Its internal energy at saturated liquid state is 200 3Jikg and saturated vapor state is 900 kJ/kg. Determine its internal energy?