A 0.2-m-long and 25-mm-thick vertical plate (k = 15 W/m-K) separates the hot water from the cold water. The plate surface exposed to the hot water has a temperature of 100°C, and the temperature of the cold water is 7°C. Determine the temperature of the plate surface exposed to the cold water (Ts.c). Start the iteration process with an initial guess of 53.5°C for the Ts.c-

A 0.2-m-long and 25-mm-thick vertical plate (k = 15 W/m-K) separates the hot water from the cold water. The plate surface exposed to the hot water has a temperature of 100°C, and the temperature of the cold water is 7°C. Determine the temperature of the plate surface exposed to the cold water (Ts.c). Start the iteration process with an initial guess of 53.5°C for the Ts.c-

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

I got t=531.96 seconds is that right
A 0.2-m-long and 25-mm-thick vertical plate (k= 15 W/m∙K) separates the hot water from the cold water. The plate surface exposed to the hot water has a temperature of 100°C, and the temperature of the cold water is 7°C. Determine the temperature of the plate surface exposed to the cold water (Ts,c). Hint: The Ts,c has to be found iteratively. Start the iteration process with an initial guess of 53.5°C for the Ts,c .
Q9: A 2-kW resistance heater wire with thermal conductivity of k = 20 W/m - °C, a diameter of D = 5 mm, and a length of L = 0.7 m is used to boil water. If the outer surface temperature of the resistance wire is Ts = 110°C, determine the temperature at the center of the wire.
A father and son conducted the following simple experiment on a hot dog which measured 12.5 cm in length and 2.2 cm in diameter. They inserted one food thermometer into the midpoint of the hot dog and another one was placed just under the skin of the hot dog. The temperatures of the thermometers were monitored until both thermometers read 20°C, which is the ambient temperature. The hot dog was then placed in 94°C boiling water and after exactly 2 min they recorded the center temperature and the skin temperature of the hot dog to be 59°C and 88°C, respectively. Assuming the following properties for the hot dog: r = 980 kg/m3 and cp = 3900 J/kg·K and using transient temperature charts, determine (a) the thermal diffusivity of the hot dog, (b) the thermal conductivity of the hot dog, and (c) the convection heat transfer coefficient.
The outer wall consists of a 30 cm thick brick wall which is covered by a layer of styrofoam. How thick is the styrofoam layer if the temperature at the boundary between the brick and styrofoam is 0 °C. External the temperature is −15°C and the indoor temperature is 23°C.
During a picnic on a hot summer day, the only available drinks were those at the ambient temperature of 90°F. In an effort to cool a 12-fluid-oz drink in a can, which is 5 in high and has a diameter of 2.5 in, a person grabs the can and starts shaking it in the iced water of the chest at 32°F. The temperature of the drink can be assumed to be uniform at all times, and the heat transfer coefficient between the iced water and the aluminum can is 30 Btu/h·ft2·°F. Using the properties of water for the drink, estimate how long it will take for the canned drink to cool to 40°F.
What’s the correct answer for this please ?
Find the temperature profile of the rectangular plate 4m x 4m, whose temperature at the side are given below: Take delx= del y= 1 m. 100 C 75 C OC 50 C
The boiling temperature of nitrogen at atmospheric pressure at sea level (1 atm) is -196°C. Therefore, nitrogen is commonly used in low temperature scientific studies since the temperature of liquid nitrogen in a tank open to the atmosphere will remain constant at -196°C until the liquid nitrogen in the tank is depleted. Any heat transfer to the tank will result in the evaporation of some liquid nitrogen, which has a heat of vaporization of 198 kJ/kg and a density of 810 kg/m3 at 1 atm. Consider a 3-m-diameter spherical tank initially filled with liquid nitrogen at 1 atm and 196°C. The tank is exposed to 22°C ambient air with a heat transfer coefficient of 22 W/m2 · °C. The temperature of the thin-shelled spherical tank is observed to be almost the same as the temperature of the nitrogen inside. Disregarding any radiation heat exchange, determine the rate of evaporation of the liquid nitrogen in the tank as a result of the heat transfer from the ambient air in kg/sec. Answer in…
A square thermal window is constructed of two sheets of flat glass, each 4.00 mm thick, separated by 5.00 mm of stationary air. If the inside of the window is at 20.0 oC, the external one at -30.0 oC and the cross-sectional area of the window is 6.00 m2, determine for the steady state: kglass= 0,80 W/(m*K); kair= 0,024 W(m*K) a) The temperatures between the air layer ?1 and ?2 indicated in the figure.b) The flow of heat through the window
Q2 A 2 kW resistance heater wire with thermal conductivity of k = 20 W/m °C, a diameter of D = 5 mm, and a length of L= 0.7 m is used to boil water. If the outer surface temperature of the resistance wire is Ts= 110°C, determine the temperature at the center of the wire. Q3: Consider a 20-cm-thick large concrete plane wall (k = 0.77 W/m °C) subjected to convection on both sides with T1 = 27°C and h₁ = 5 W/m² °C on the inside, and T2 = 8°C and h₂ = 12 W/m² °C on the outside. Assuming constant thermal conductivity with no heat generation and negligible radiation, (a) express the differential equations and the boundary conditions for steady one-dimensional heat conduction through the wall, (b) obtain a relation for the variation of temperature in the wall by solving the differential equation, and (c) evaluate the temperatures at the inner and outer surfaces of the wall. Ans: (a) Ans: 121.4 °C dT (L) -k dx -=h₂ [T(L)-T₂] (b) T(x) = 20-45.44x Q4: A double pane window consists of 3 mm thick…
A cold aluminum-canned (ε=0.60) soda is initially at a uniform temperature of 6°C. The can is 12.27 cm high with diameter of 6.60 cm. If the convection heat transfer coefficient between the can and the surrounding air at 25°C is 4.85 W/(m²-ºC), determine how long it will take for the average temperature of the soda to rise to 10ºC. Solve this problem approximately by assuming a constant average temperature of the soda during the process. For the soda use the properties of water at room temperature, p 1000 kg/m³ and Cp = 4180 J/kg-°C. Consider both convective and radiative heat transfer. =