A windmill is attached to an electric generator that produces an average electric power of 5 kW. The poweris used to charge a storage battery for 8 hours. If the amount of energy stored in battery is 1.27x105 kJ, determine the heat transfer from the battery to the surroundings in

Q: An object whose mass is 250 kg is located at an elevation of 30 m above the surfaceof the earth. For…

A:

Q: Determine the work done by a 1 kgm fluid system as it expand slowly in a closed system from p1 =…

A:

Q: soap bubble with a diameter of 2.03" is to be enlarged by blowing air into it. If the surface…

A: Given:d1=2.03 inσ=0.0041 lbf/ftd2=4.85 in

Q: Two-fifth Ib of gas is contained in a piston cylinder assembly at 1.6ft /lb and 100psia. The gas is…

A:

Q: Determine the Kinetic energy in BTU of a 8 lbm block moving at a velocity of 85 ft/s.

A: Given data  mass of block (m)= 8 lbm velocity of block(v) = 85 ft/s

Q: A piston cylinder assembly was insulated so that no heat could get in or get out. If the system was…

A:

Q: The piston of a vertical piston-cylinder device containing a gas has a mass of 40 kg and a…

A: The free-body diagram of the piston can be drawn as follows,

Q: A mass of 15 kg of air in a piston–cylinder device is heated from 25 to 95°C by passing current…

A: The flow of electricity is considered as the work done on the system. The enthalpy change of the gas…

Q: Nitrogen in a rigid vessel is cooled by rejecting 100 kJ/kg of heat. Determine the internal energy…

A: Given: The heat rejected by the nitrogen from the rigid vessel is ∆Q=-100 kJ/kg As the vessel is…

Q: 10 kg/s of water at 20°C enters a heater at constant pressure and leaves at 30°C. Determine (1) The…

A: Given data,  m= 10 kg/s  T1= 20°C = 293K  T2= 30°C = 303K  Cp= 4.187 kJ/kg°C

Q: soap bubble with a diameter of 2.12" is to be enlarged by blowing air into it. If the surface…

A:

Q: A vertically arranged piston-cylinder assembly with a mass and area of a piston given as 55 kg and…

A:

Q: A vertically arranged piston-cylinder assembly with a mass and area of a piston given as 44 kg and…

A: Data given-

Q: A closed rigid container has a volume 1m' and holds air at 345 kPa and 20 °C. Heat is added until…

A: Volume = 1 m3 Pressure = 345 kpa Temperature T1 = 20 C Temperature T2 = 327 C

Q: A gas whose original pressure and volume were 300 kN/m 2 and 0.14 m3 is expanded until its new…

A: Write the given data with suitable variables. P1=300 kN/m2V1=0.14 m3P2 =60 kN/m2

Q: 1. Determine the work done by 1-kg fluid system as it expands slowly within the piston-cylinder…

A:

Q: A vertically arranged piston-cylinder assembly with a mass and area of a piston given as 54 kg and…

A: Patm =92 KPaW = 54 kgQ= -1.95 KJm=3.1 gV1=0.0042 m3u1 =602 KJ/KgV2=0.0021 m3R=8.314 KJ/Kg-K

Q: Determine the Kinetic energy in BTU of a 7 lbm block moving at a velocity of 85 ft/s

A: given  weight = 7 lb  and velocity ,v=85ft/s

Q: Two-fifth Ib of gas is contained in a piston cylinder assembly at 1.6ft/lb and 100psia. The gas is…

A:

Q: A gas contained in a vertical cylindrical tank has a volume of [10 + (K/100)] m3. The gas receives a…

A: Q =U + W specific work W = (P*t)/m

Q: Calculate the total potential energy, in Btu, of an object that is 20 ft below a datum level at a…

A: Given: The mass is m=100 lbm. The gravitational acceleration is g=31.7 ft/s2. The height below the…

Q: During the expansion of a gas in piston-cylinder the relation between the pressure and the volume is…

A: Given data: Polytropic process with polytropic index (n) = 1.2 Initial pressure (P1) = 500 kPa…

Q: When an object of 4 kg changes it’s velocity from 10 to 30 m/s, what is its kinetic energy change…

A: mass m=4kg initial velocity V1=10m/s final Velocity V2=30m/s To Find the kinetic energy change in KJ

Q: A gas contained in a vertical cylindrical tank has a volume of [10 + (30/100)] m³. The gas receives…

A:

Q: 500J/(Kg.°C) is: The quantity of heat required to raise the temperature of 500 g of iron by 2 C…

A: Given, Mass of iron = m = 500 g = 0.5 kg Change in temperature = ΔT = 2 oC Specific heat capacity of…

Q: Determine the energy transferred by conduction in 31 minutes, between the two faces of a concrete…

A: Time, t=31 minutes = 31*60=1860 sec Wall Area, A=24.2 m2 Wall thickness, L=29.2 cm=0.292 m Inside…

Q: 2. A 2-Kg mass of oxygen expands at a constant pressure of 172 KPa in a piston-cylinder system from…

A:

Q: The heat capacity of a liquid is 250 J/K, if its mass is 50 kg the specific heat capacity of the…

A: To find : The specific heat capacity of the liquid. Given data : The heat capacity of a liquid is…

Q: In a piston cylinder device, 15 kg of air is heated from 25°C to 77°C by passing current through a…

A:

Q: enlarged by blowing air into it. If the surface tension of the soap solution is 0.0047 lbf/ft,…

A:

Q: As a spherical ammonia vapor bubble rises in liquid ammonia, its diameter changes from 1 cm to 3 cm.…

A: Given: The initial diameter is d=1 cm=0.01 m. The final diameter is d’=3 cm=0.03 m. The surface…

Q: An insulated piston-cylinder device initially contains 1.8 kg of Argon at 100 kPa and 300 K. Now an…

A: Given dataMass of the argon m = 1.8kgInitial pressure P1 = 100kPainitial temperature T1 =…

Q: Determine the work done by a 1 Kgm tluid system as it expand slowly in a closed system from P= 2.84…

A:

Q: A spring whose spring constant is 200 lbf/in has an initial force of 100 lbf acting on it. Determine…

A:

Q: The attached figure shows a gas contained in a vertical piston– cylinder assembly, where D = 10 cm.…

A: a)Calculate the change in elevation of the piston-shaft.

Q: A mass of 15 kg of air in a piston-cylinder device is heated from 25 to 77°C by passing current…

A: Heat is a form of energy which occurs due to the thermal variation. It transfers from the high…

Q: Consider a room with indoor temperature of 28°C and the outdoor temperature of 32°C. Due to the…

A:

Q: Assume 8 lb of a substance receive 240 Btu of heat at constant volume and undergo a temperature…

A: Given Data m=8 lb Q=240 BTU ∆T=150°F

Q: to be enlarged by blowing air into it. If the surface tension of the soap solution is 0.0038 lbf/ft,…

A:

Q: The force required to expand the gas in a gas spring a distance x is given by F = Constant ________…

A: work=∫0.10.3Cxkdxwork=C1-kx1-k|0.30.1work=1.87 KJ

Q: A piston-cylinder assembly contains water that undergoes a series of processes. Process 1-->2:…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: A soap bubble with a diameter of 2.28" is to be enlarged by blowing air into it. If the surface…

A:

Q: 21.313 kg per second of water at 0.03398675 kbarg and internal energy of 15000 kW is heated at…

A:

Q: A 16-cm diameter copper ball is to be heated from 100°C to an average temperature of 150°C in 25…

A: Given Data D=16 cm Ti=100°C Tf=150°C C=0.395 kJ/kgK

Q: Propane (MW = 44 ; k = 1.13) initially at 30 psia and 215°F, is stored inside a large spherical…

A: Given: The molecular weight of propane is mw=44 kg/mol. The heat ratio is k=1.13. The value of…

Q: B. 5 kilograms of saturated liquid water is maintained at a constant pressure of 800 kPa while heat…

A:

Q: The force F required to compress a spring a distance x is given by F – F0 = kx where k is the spring…

A: given:initial spring force F0=100Nk=300N/cminitially at a distance x1=0compressed distance x2=1cm

Q: A 4-kW resistance heater in a water heater runs for 3 hours to raise the water temperature to the…

A: given:P=4KWtime T=3hours