please very urgent i need the right answer please be carfully A solid body of length L with a rectangle crosssection has a temperature distribution equals toT= (-A/k)*e^(-x)+Bx+C. K is the conductivityand it is equal to 1 W/m.k. At x= 0 thetemperature is equal to 335 K. At x= L the bodyis well insulated. The relation between B iswritten in terms of C as:a. (335-C)*e^(-L)○ b. C-e^(-L)○ C. C+e^(-L)Clear my choice

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Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter2: Steady Heat Conduction

Section: Chapter Questions

Problem 2.52P

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The figure shows the cross section of a wall made of three layers. The thicknesses of the layers are L1. L2 =0.500 L1. and L3 = 0.350 L1. The thermal conductivities are k1, k2 = 0.800 k1, and k3 = 0.680 k1. The temperatures at the left and right sides of the wall are TH = 20 °C and Tc = -10 °C, respectively. Thermal conduction is steady. (a) What is the temperature difference AT2 across layer 2 (between the left and right sides of the layer)? If k2 were, instead, equal to 1.100 k1, (b) would the rate at which energy is conducted through the wall be greater than, less than, or the same as previously, and (c) what would be the value of AT2? k1 ko k3 TH Tc L1 L9 L3 (a) AT2 = i (b) (c) AT2= i
The figure shows the cross section of a wall made of three layers. The thicknesses of the layers are L₁, L2=0.750 L₁, and L3 = 0.350 L₁. The thermal conductivities are k₁, k₂ = 0.840 k₁, and k3 = 0.780 k₁. The temperatures at the left and right sides of the wall are TH = 23 °C and Tc = -10 °C, respectively. Thermal conduction is steady. (a) What is the temperature difference AT2 across layer 2 (between the left and right sides of the layer)? If k2 were, instead, equal to 1.160 k₁, (b) would the rate at which energy is conducted through the wall be greater than, less than, or the same as previously, and (c) what would be the value of AT2? TH k₁ L₁ kg|kz kq L₂ L3 Tc
1. please write clean and as much detail as you can 2. please draw the FBD since I am not understanding the temperature placement on this question 3. to make your job easier the following formula apply : Q_cond=Q_conv+Q_radi KA(T_i-T_o )/L=hA(T_s-T_∞ )+ε σ A(T_s^4-T_∞^4 )
#4: A rod of length L. coincides with the interval [0, L] on the x-axis. Let u(x, t) be the temperature. Consider the following conditions. (A) The left end is held at temperature 0°. (B) The right end is insulated. (C) There is heat transfer from the lateral surface of the rod into the surrounding medium, which is held at temperature 0° (D) The left end is insulated. (E) The initial temperature is 0° throughout. (F) The right end is held at temperature 0°. (G) There is heat transfer from the right end into the surrounding medium, which is held at a constant temperature of 0°. (H) There is heat transfer from the left end into the surrounding medium, which is held at a constant temperature of 0°. In each part below, determine which of the above conditions corresponds to the given initial or boundary condition for the heat equation. (a) u(x, 0) = 0 (b) u(0, 1) = 0 (c) du (d) ou x=L ox|x=0 = -hu(L, 1) = hu(0, 1)
A thin bar of length L = 3 meters is situated along the x axis so that one end is at x = 0 and the other end is at x = 3. The thermal diffusivity of the bar is k = 0.4. The bar's initial temperature f(x) = 300 degrees Celsius. The ends of the bar (x = 0 and x = 3) are then put in an icy bath and kept at a constant O degrees C. Let u(x, t) be the temperature in the bar at x at timet, with t measured in seconds. Find u(x, t) and then u7 (2, 0.1). Put uz (2, 0.1) calculated accurately to the nearest thousandth (3 decimal places) in the answer box.
Just want to understand this review example
A thin bar of length L = 3 meters is situated along the x axis so that one end is at x = 0 and the other end is at x = 3. The thermal diffusivity of the bar is k = 0.4. The bar's initial temperature f(x) = 50 degrees Celsius. The ends of the bar (x = 0 and x = 3) are then put in an icy bath and kept at a constant 0 degrees C. Let u(x, t) be the temperature in the bar at x at time t, with t measured in seconds. Find u(x, t) and then u4 (2, 0.1). Put u4(2, 0.1) calculated accurately to the nearest thousandth (3 decimal places) in the answer box.
1
question A B and C
5. Given below is a log-log plot of thermal conductivity (Kt) vs temperature (T) of a non-metallic electric insulator. Explain the respective variations in KT with Tin the three different regimes indicated in the figure. (b) - exp(8,/27) Slope = +3 Slope =-1 II log T log K
under steady-state conditions. If you are given T1 = 200 °C and T2 = 164 °C, determine: a) the conduction heat flux, q,.cond, in m2 W from x = 0 to x = L b) if the dimensions of the triangle ares 15 mm and h 13 mm, calculate the heat transfer due to convection, q,y, in W at x = L Finsulation T2 T T = 20°C h = 500 W/m2.K Triangular Prism x L x 0 L= 50 mm k = 100 W/m-K
include diagram.

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