Temperature of cooling chamber of refrigerator is kept at T1 = 280 K. If the surrounding temperature 1.5 times the temperature of cooling chamber, find the COP of refrigerator. Now, if the surrounding temperature is 1.4 times the cooling chamber temperature, what is new COP?

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A: Let, m is the mass of the gas and dt is the temperature change of the gas. The expression for the…

Q: 2-A closed container is filed with 2 kg of R-134a refrigerant at P=200 kPa. If the volume of the…

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Q: Q4- Water in piston cylinder system at (T1 and X1). The water is heated isothermally until the…

A: Let initial,intermediate and final stages be represented by 1,2&3. Given data:-Initial…

Q: A pulley has 5 supporting lines and supports an 800N weight. A force of 190N is required to move the…

A: From the given data: Load = 800 N Effort required to move the weight = 190 N Number of pulley = 5

Q: 3. How much heat is released by a system when 45Jof work is done on it to decrease energy to 23 J

A: Given Data Work done on the system is : W=45 J Decreased energy of system is : ∆E=-23 J Now from…

Q: A heat sink for computer server absorbs all the heat generated and cools down by air flow. The air…

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Q: Q4- Water in piston cylinder system at (T1 and X1). The water is heated isothermally until the…

A: Let initial,intermediate and final stages be denoted as 1,2&3. Given:- Initial conditions of…

Q: A plate made of mild steel having 10 cm thick, maintaining temperature 250°C. The convection &…

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Q: A room changes the room air from with outside air at 2 kg/hr (air density is 1.2 kg/cu.m). If the…

A: Given              Mass, m = 2 kg/hr = 0.000555 kg/s Temperature, T1 = 800F                       T2…

Q: . A perfect gas has a value of R=0.298 KJ/kg-K and k=1.26. If 200 KJ of heat are added to 2 kg of…

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Q: Find the potential energy stored in object Mass=8 kg Height to be raised=10 m

A: Given data : Height to be raised h=10 m Mass m=8 kg Acceleration due to gravity g=9.81 m/s2…

Q: Thermodynamics problem. If I have water vapor at 125◦C inside a piston, what pressure is necessary…

A: The pressure necessary to convert the vapor to liquid water without changing the temperature is…

Q: A 2-kW electric resistance heater in a room is turned on and kept on for 30 min. Find the amount of…

A: Write the given data in the problem. P=2 kW  t=30 min Here, P is the power consumed by the heater,…

Q: Find the potential energy stored in object Mass=8 kg Height to be raised=10 m

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Q: R-134a at state 1 is contained in a piston-cylinder device at T₁ = -12°C and P₁ = 0.2MPa. The fluid…

A: The temperature at state 1 is .The pressure at state 1 is .Heat is added at constant pressure, the…

Q: Find the potential energy stored in object Mass=8 kg Height to be raised=10 m

A: Given : Mass, m = 8 kg Height to be raised, h = 10 m To find : Potential energy stored in object

Q: 2. Explain the operation of Thermal system with neat diagram

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Q: How many quadratic degree of freedom does water have if there is a temperature change from 300K to…

A: Water is a triatomic molecule as it consists of two hydrogen molecules and one oxygen molecule. The…

Q: The ventilation in a house changes the air every five hours. How much power does it take to warm the…

A: Given : A = 150 m2 T0 = 0 C To find : Power required

Q: QI. A hydroelectric station has a cubic tank of height 50m above the earth. This cubic tank has an…

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Q: A gas tank is accidentally placed near a heat source. Its bourdon pressure gauge reading was…

A: Considering gas tank to be rigid and given gas as ideal gas, we solved it using ideal gas equation…

Q: Metal container with a mass of 2 kg and containing 2.30 kg of water is put it on a fire. Assume that…

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Q: Find temperature 32 F in Celsius, Kelvin and Rankine

A: Here,  Temperature in fahrenheit = TF = 32 oF   (1) Temperature in Celcius From the relation between…

Q: By using an example explain the difference between the steady-state and dynamic state of the…

A: Solution:   The major difference between the steady-state and dynamic state process is given below:

Q: n wall then the work done by force on wall

A: given: when  a force is applied on wall then the work done by force on wall is?

Q: A new temperature scale called grande (gr) is to be invented where freezing and boiling temperature…

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Q: 110 joule of heat is added to a gaseous system, whose internal energy is 40 J. Then the amount of…

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Q: Find kinetic energy

A: Given data : Mass of ball (m)=290 g Velocity of ball (V)=35 cm/s   Find : Kinetic energy

Q: hat is free to move has a mass of mp and a dia ressure is Patm. Now, heat is transferred to ref iven…

A: GivenMass of piston, mP= 11 kgdiameter of piston, dp=0.17 mmg=1.36 kg, T1=-9°C, T2=23°CPatm=89 kPa

Q: 4. An unknown substance with mass 2.5 kg is heated to ther placed in 1.5 kg of water at 10'C for an…

A: given:m1=2.5kgT1=2000Cm2=1.5kgT2=100CTeq=560C

Q: Find the work done by a variable force in two dimensions?

A: The work is said to be done by a force if force results in the displacement of the body in the…

Q: -16 The store advertisement claims that a new light bulb type consumes only 9 W to generate the same…

A: For solution refer below images.

Q: In class, Dr. Tree cited heat transfer from a hot body to cold body as an example of process goes in…

A: The two head addition process are cited below. 1. Melting of ice into water in this process heat is…

Q: b. The ceiling of a certain room in a student's dormitory has an area of 200 ft’. It contains…

A: Heat is a form of energy which transfers from high temperature reservoir to the low temperature…

Q: The amount of heat extracted in the evaporator of the refrigerator is small as compared to the heat…

A: When the door of the refrigerator is left open inside the room, the net heat rejected by the…

Q: A test cylinder with a constant volume of 2m3 contains saturated liquid water at the 100°C. It now…

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Q: A 5kW heater is in the lab, but the lab losses heat to its outside surroundings. The heat transfer…

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Q: mechanical energy at the rate of 35 W. If thermal conductivity of

A: Given that, Diameter of the rod, D=5 cm,Length of rod, L=90 cm,Environment Temperature, T∞=32…

Q: mple 4.1 A stationary mass of gas is compressed without friction from an ini- tial state of 0.3 m…

A: As per given question we have defind the  internal energy of gas change

Q: This fixed-mass system undergoes an isothermal, quasi-equilibrium process from state 1 to state 2.…

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