Physics, 10.03.2020 21:53 bessieyounger1211
A 0.05-m3 rigid tank initially contains refrigerant-134a at 0.8 MPa and 100 percent quality. The tank is connected by a valve to a supply line that carries refrigerant-134a at 1.2 MPa and 40°C. Now the valve is opened, and the refrigerant is allowed to enter the tank. The valve is closed when it is observed that the tank contains saturated liquid at 1.2 MPa. The properties of refrigerant are v1 = 0.02565 m3/kg, u1 = 246.82 kJ/kg, v2 = 0.0008935 m3/kg, u2 = 116.72 kJ/kg, and hi = 108.28 kJ/kg. A) Determine the heat transfer (Q). B) Determine the mass of the refrigerant that has entered the tank.
Answers: 1
Physics, 21.06.2019 17:40
Current enters a circuit at a: 1.positive terminal 2.negative terminal 3.low potential side 4.resistor
Answers: 1
Physics, 22.06.2019 01:30
Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.
Answers: 1
Physics, 22.06.2019 14:00
Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.
Answers: 1
A 0.05-m3 rigid tank initially contains refrigerant-134a at 0.8 MPa and 100 percent quality. The tan...
Health, 16.10.2020 05:01
Health, 16.10.2020 05:01
Mathematics, 16.10.2020 05:01
History, 16.10.2020 05:01
Mathematics, 16.10.2020 05:01
Mathematics, 16.10.2020 05:01
Mathematics, 16.10.2020 05:01
Mathematics, 16.10.2020 05:01
English, 16.10.2020 05:01
Mathematics, 16.10.2020 05:01
Health, 16.10.2020 05:01