Compute the heat transfer through the air condition if the outside temperature is outside temperature, To = 5 degrees Celsius, inside temperature = 20 degrees Celsius, in a room with length 5 m, width of 6 m and height of 4 m. A typical volume flow for ventilation is 20 liters/second or 0.02 cubic meter/s, how much time will it take to replace all air within this room? Then, compute total thermal power flux out of the room through the ventilation? Given, Cp = 1005 J/khK, and roho = 1.2 kg/cubic.

Q: On a cold winter day, the outside temperature is -5.0 degrees celsius while the interior of a…

A: Heat transfer takes place when there is a temperature difference between two objects. The…

Q: In a student experiment, a constant-volume gas thermometer is calibrated in dry ice (-78.5°C) and in…

A: Part A:

Q: A naked patient undergoes surgery in a warm room. Determine the ratio Pe/Pe. where Pe is the…

A: The skin temperature Ts=320C The room temperature TR=290C The total body area A=1.3 m2 The…

Q: 2-21 We consider a thin element of thickness Ar in a large plane wall (see Fig. 2-13 in the text).…

A:

Q: Task 7 (25 points) A solid concrete wall 4.0 m by 2.4 m and 30. cm thick, with a thermal…

A: Area, A = 4 m x 2.4 m  thickness, d = 30cm = 0.3 m conductivity, K = 1.3 W/m K Temperature change,…

Q: Then calculate the heat current through the wall per unit area. The units for this are Wm-2. Just…

A: in this question determine the heat current  through the wall. we determine fisrt per unit area of…

Q: When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are…

A: Adiabetic process does not exchange heat from system to surrounding or surrounding to system.

Q: A 2-m * 1.5-m section of wall of an industrial furnaceburning natural gas is not insulated, and the…

A:

Q: Consider a flat-plate solar collector placed on the roof of a house. The temperatures at the inner…

A:

Q: Under what conditions can the overall heat transfer coefficient of a heat exchanger be determined…

A:

Q: Consider a person standing in a room at 18°C. Determine the total rate of heat transfer from this…

A: The total heat transfer rate can be written as,

Q: On a cold winter day when the temperature is -20.0 ∘C, what is the amount of heat needed to warm to…

A: Given : Temperature on winter day, Tw = - 20 oC Body temperature, Tb = 37 oC Amount of air exchanged…

Q: In a one-shell and two-tube heat exchanger, cold water with inlet temperature of 20°C is heated by…

A: Consider that the heat exchanger is completely insulated.   The temperature variation occurs in 1-D…

Q: The quantity of energy Q transferred by heat conduction through an insulating pad in time interval…

A: Given that the quantity of energy Q transferred by heat conduction through an insulating pad in time…

Q: Question 1 If the actual value for coefficient of linear expansion of the rod is 0.000012 /C°, and…

A:

Q: For the human body, what is the rate of heat transfer by conduction through the body’s tissue with…

A: Given Data: The thickness of tissue is, d=3.00 cm The difference in temperature is, Th-Tc=2.0℃ The…

Q: Given the heat capacity of copper (0.385 J/goC) and of water, if you place a 100oC copper block into…

A:

Q: Suppose you want to raise the temperature of a mass m of ice from T0 100 °C. In this problem,…

A:

Q: If a river having a flow rate of 942 cubic feet per second flows over a waterfall having a height of…

A: Given The flow rate of the river is Q = 942 ft3/s. The height of the waterfalls is h = 14 m. The…

Q: 1.900 x 106 J of heat is added to a cylinder of aluminum (radius 5.000 cm, length 10.00 cm) at room…

A:

Q: Assume that 50 % of the potential energy of a rain- drop turns into internal energy of the drop, as…

A: Relation between potential energy and internal energy of drop according to the question, 12PE=U…

Q: When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are…

A: Given data:

Q: Suppose 160 W of heat flows by conduction from blood vessels under the skin to the body's surface…

A:

Q: Can we define the convection resistance for a unit surface area as the inverse of the convection…

A: To define: Convection resistance for a unit surface area as the inverse of the convection heat…

Q: A test is conducted to determine the overall heat transfer coefficient in anautomotive radiator that…

A: Given data:   The number of tubes in the radiator is n = 40 tubes. The internal diameter of the…

Q: Consider a block of ice, with a mass of 2.00 kg and an initial temperature of -8.00°C. Given the…

A:

Q: calculate the thermal conductivity for He at 25 C and 1 atm given the following information :at…

A: Temperature = 25 Degrees Celsius pressure = 1 atm  velocity of helium = 1360 m mean free path = 7.2…

Q: A naked patient undergoes surgery in a warm room. Determine the ratio Pc /Pe, where Pc is the…

A:

Q: In an experiment to determine the specific heat of copper, a piece of copper weighing 50.06 is first…

A: Given data: The mass of copper piece is mc=50.06 g. The initial temperature of piece is Ti=100℃.…

Q: (a) Cherry-red embers in a fireplace are at 850ºC and have an exposed area of 0.200 m2 and an…

A:

Q: Lake Erie contains roughly 4.50E+11 m3 of water. How much heat is required to raise the temperature…

A: Given , volume of water = 4.50E+11 m3  density of water = 1000 kg/m3 Difference in temperature of…

Q: Estimate the rate at which heat can be conducted from theinterior of the body to the surface. As a…

A: The rate at which the heat can be conducted from the interior of a body to the surface is given by;…

Q: A 1.5mx0.8m double glass window consists of two glass(k=0.78 W/mC) layers with a 4 mm thickness for…

A: Given, Area, A=1.5 m×0.8 m=1.2 m2, Length of glass pane, L=4 mm=0.004 m, Length of air gap, L1=10…

Q: On a hot dry day, evaporation from a lake has just enough heat transfer to balance the 1.00 kW/m2 of…

A: Given: The heat transfer from the sun is Q=1 kW/m2. The time of evaporation is t=1 h. The area of…

Q: An apparatus that liquefies helium is in a room maintained at 300 K. If the helium in the apparatus…

A:

Q: Answer the following by filling the blank: During a bout with the flu, an 80-kg person ran a fever…

A: Mass of body , M=80 kg Specific heat , S = 3470 J/kg K Final temperature , Tf = 39 oC We know…

Q: A 50-m-long section of a steam pipe whose outer diameteris 10 cm passes through an open space at…

A:

Q: Where segments ad & bc are the processes and segment ab & cd are the processes; and the volumes…

A:

Q: In Joule's experiment, if a 10.0 kg mass falls a distance of 1.0 m, and the paddle is immersed in a…

A:

Q: To what temperature will 9400 J of heat raise 2.5 kg of water that is initially at 11.0 °C? The…

A: Given:  mass of water (m) = 2.5 Kg             specific heat of water (c) = 4186 J/Kg °C…

Q: Calculate the length of a 1-meter rod of a material with thermal expansion coefficient α when the…

A: Temperature dependence of length

Q: For the human body, what is the rate of heat transfer by conduction through the body’s tissue with…

A: Rate of transfer of heat through body’s tissue is,

Q: Assuming that the temperature of the breathe of a human being is 35°C and the relative humudity is…

A:

Q: you have been provided with a copper container of mass 500 gand contains 1 litreof water at 293 K.…

A: Mass of copper = m = 500 g =0.5 kg Mass of 1 litre of water = M = 1 kg Initial temperature = t = 293…

Q: What approximately is the power of the thermal radiation?

A: We can consider human body as nearly black body as it has the emissivity=e =0.98 The power or energy…

Q: Radioactive decay of elements in the earth’s interior results in a mean heat flux through the…

A: