Please answer all my questions A house walls that are 21 cm thick and have an average thermal conductivity twice that of glass wool. Assume there are no windows or doors. The walls’ surface area is 1350000 cm2 and their inside surface is at 21°C, while their outside surface is at 6°C. (Thermal conductivity of glass wool is 0.042 W/m°C) (i) Calculate the rate of heat conduction through house walls? Answer for part 1 (ii) How many 100W room heaters would be needed to balance the heat transfer due to conduction? (approximate number) Answer for part 2 b) A spherical infrared heater of radius 5.5 cm has an emissivity of 0.73. What temperature must it run at if the required power is 0.54 kW? Neglect the temperature of the environment. (Stefan's constant = 5.67*10-8 Wm-2K-4) The temperature of the heater in Celsius =

Q: At a local convenience store, you purchase a cup of coffee, but, at 98.4°C, it is too hot to drink.…

A: Given: Initial temperature of coffee T1 = 98.4°C Initial mass of coffee V = 248 mL Give that density…

Q: A composite wall, measuring 8m width by 2.5m height, consists of 3 layers of different materials.…

A:

Q: What is the rate of heat transfer by radiation, with an unclothed person standing in a dark room…

A: Given: The ambient temperature is T=22.0ºC. The normal skin temperature of T'=33.0ºC. The surface…

Q: In memory of conditions in the trenches of World War I a century ago, estimate the heat flow from a…

A: Heat flow always occurs when there is a temperature difference among the materials. The temperature…

Q: A window glass that is 0.5 cm thick has dimensions of 3 m by 1.5 m. The thermal conductivity of this…

A: Givend = 0.5 cm = 0.005 m

Q: A window of a car is found to be covered with 0.9 cm of ice. If the area of the window is 1 m2, and…

A:

Q: Suppose you stand with one foot on ceramic (k=34 W/mK) flooring and one foot on a wool carpet (k…

A: Given that, the value of K of ceramic and K of wool carpet an area of contact and temperature of…

Q: Consider two different construction materials with the following R values: R = 2R and R = R. If the…

A: From the expression of the R-value, determine the coefficient of thermal conductivity of both the…

Q: Suppose a person inhales and exhales 2.25 L of 37.0°C air, evaporating 4.2 × 10-2 g of water from…

A: a) The expression for Q is

Q: A 40-cm-diameter, 110-cm-high cylindrical hotwater tank is located in the bathroom of a house…

A:

Q: Bebang owns a 130-mm-thick concrete brick table top that has an area of 10,000,000 mm^2 and a…

A:

Q: A window is 3.01 meters tall and 1.49 meters wide. What is the rate of heat lost if the window is…

A: Given Data:- Height of the window h=3.09 m width of the window is w=1.49 m Thickness of the window…

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

A: Given, Thickness, d=3 cm=0.03 m, Area, A=1.50 m2, temperature change, ∆T=2.00 C, Energy intake,…

Q: A granite wall has a thickness of 69.8 cm, an area of 5.21 m by 2.82 Im and a thermal conductivity…

A: Rate of change of  heat across a conductor of thickness x area of cross section A and thermal…

Q: Some properties of a certain glass are listed here: Density 2300 kg/m3 Specific heat capacity 840…

A: K= 0.80 W/m ∙ C°  A= (2.7×2.4) = 6.48 m2  ∆T = 19-4 = 15 x= 0.009 m

Q: During an accident, (5.70x10^0) g of boiling water at 100.0°C was splashed onto a burn victim's skin…

A: mass of boiling water = 5.7 g initial temperature of water = 100oC final temperature of water =…

Q: A glass window is 1.9 mm thick, is 2.32 m tall by 1.08 m wide, and has a thermal conductivity of 1.0…

A:

Q: Suppose you stand with one foot on ceramic (k=34 W/mK) flooring and one foot on a wool carpet (k…

A: a)  The required rate of heat transfer that occur from the foot kept on wool carpet is, Qt=kA∆Td…

Q: A copper rod has a length of  1.5m1.5m and a cross-sectional area of 4.0×10−4m24.0×10−4m2. One end…

A:

Q: 1. An iron plate 2cm thick has a cross-sectional area of 5000cm?. One face is at 150°C, and the…

A: Given  Thickness of plate (L ) = 2 cm                                           = 0.02 m   Area of…

Q: On a cold winter morning you step outside to get into your car and drive to work. Your car's…

A:

Q: The average thermal conductivity of the walls (including windows) and roof of a house in the figure…

A: The formulas used to solve the problem are listed below. The volume of gas that must be burned will…

Q: A window glass 0.50-cm thick has dimensions of 3.0 m by 1.5 m. If the outside temperature is -10°C…

A:

Q: Q25 1) The walls of a house are 17 cm thick and have an average thermal conductivity four times that…

A: We need to calculate rate of heat conduction and the total heat conducted in 3 min.

Q: At what rate is heat lost through a 1.3m ×2.7m rectangular glass window that is 0.32cm thick when…

A:

Q: what is Spongebob’s thermal conductivity in watts per meter degree Celsius if he is 0.110m thick and…

A:

Q: Suppose you walk into a sauna that has an ambient temperature of 39.0°C. (a) Calculate the rate of…

A:

Q: Suppose you walk into a sauna that has an ambient temperature of 50.0ºC . (a) Calculate the rate of…

A: Given: The ambient temperature of the sauna = 500 C The temperature of the skin = 370 C The…

Q: The surface area of the human body is about 1.8 m2. If an average 37 C human is surfing in 10°C…

A:

Q: The inner and outer surfaces of a 0.5-cm thick 2-m * 2-m window glass in winter are 10°C and 3°C,…

A:

Q: The exterior wall of a house consists of three different building materials: 1.0 cm thick drywall…

A:

Q: Suppose you stand with one foot on ceramic (k=28 W/mK) flooring and one foot on a wool carpet (k…

A: Thermal conductivity of ceramic is kc = 28 W/mK Thermal conductivity of wool is kw = 0.036 W/mK…

Q: Bebang owns a 230-mm-thick concrete brick table top that has an area of 10,000,000 mm^2 and a…

A: Given:-  The thickness of the concrete brick table top is d1= 230 mm.=0.230 The Area of the concrete…

Q: A human body has a temperature of 300 If its total surface area is 1.2 m2, what is the net rate of…

A: Given, Temperature of the body, Tb = 30 °Ctotal surface area of body, A = 1.2 m2surrounding…

Q: window glass 0.50-cm thick has dimensions of 3.0 m by 1.5 m. If the outside temperature is -10°C and…

A:

Q: The inner and outer surfaces of a 0.41-cm-thick 2.27-m x 2.81-m window glass in winter are 10.9°C…

A: Given , thickness of window = 0.41cm so L = 0.0041m             Temperature difference ,∆T=…

Q: At what rate is heat lost through a 1.09 m × 3.16 m rectangular glass window that is 0.518 cm thick…

A:

Q: 19.10 A single-thickness glass window on a house actually has layers of stagnant air on its two…

A:

Q: Suppose a house's walls are 13.5 cm thick and and have an average thermal conductivity twice that of…

A: T1, outside surface temp.= 5.15°C T2, inside surface temp. =16°C

Q: What is the rate of heat conduction through the 3.00-cm- thick fur of a large animal having a…

A:

Q: Suppose a human body's core internal temperature is 37.0°C, the skin temperature is 34.0°C, the…

A:

Human Metabolism

Being described as the most complicated machine ever encountered by humans, the human body and the cell metabolism is nothing less than a wonder. Metabolism is the set of life-sustaining chemical reactions within organisms.