Problem 8. Energy is generated uniformly in a 20cm thick wall the steady state temperature distribution of the wall is indicated on the table below; z (cm) T(C) 0 2 4 6 8 10 12 14 16 18 20 150 177 205 230 250 272 292 310 330 345 360 If thermal conductivity of the wall is 15 W/m.K and the indicated temperatures are in °C, determine the average rate of heat generation in unit volume.

Q: 1-85 A transistor with a height of 0.4 cm and a diameter of 0.6 cm is mounted on a circuit board.…

A: given = H = 0.4 cm d = 0.6 cm avg heat transfer coefficient = 30 W/m2K air temp Tair = 55^c…

Q: Steel pipe 1 cm thick, 1.0 m long and 5 cm deep, covered with 2 cm thick insulation. The wall…

A:

Q: Athin isothermal disk, having a diameter of 1.8 cm, is maintained at 40◦C and buried in a…

A: Given  thermal conductivity k= 0.8 W/m· ◦C  diameter of disk is D = 1.8 cm  radius = 0.9 cm = 0.009…

Q: 2-The steady-state temperature distribution in a one-dimensional wall of thermal conductivity…

A: Given steady state temperature distribution in a one-dimensional wall T(oC) = a + bx2. Thermal…

Q: For a stream of water (at 32 °C) flowing over a plate at a constant surface temperature of (90 °C)…

A: Given:  T∞ = Twater = 32 oC            Thermal conductivity of water at 32 oC = 0.6 W/m.k…

Q: Find all letters, answer for a and b are 39.27 W and 93.7 degrees Celcius Heat is conducted through…

A:

Q: 2. Heat is transferred steadily in one direction in a composite plane wall that is made of two…

A: The objective of this question is to determine the rate of heat transfer in the system and the…

Q: A certain material has a thickness of 4 cm and its thermal conductivity is 0.04 W / m.oC. At a…

A: The heat flow rate at the given distances from the material is to be calculated.

Q: 1-65 An aluminum pan whose thermal conductivity is 237 W/m °C has a flat bottom with diameter 20 cm…

A: given = Q = 800 W d = 20 cm = 20*10-2 m2 L = 0.4 cm = 0.4*10-2 m2 wkt Q = KA(T1-T2)L

Q: Example 2.1 : Calculate the rate of heat loss through a wall of k = 0.70 W/(m K)] 5 m in length, 4 m…

A: Above problem is based on conductio.Conduction is an mode of heat transfer which is define as the…

Q: An aluminum bar has a diameter of 11 cm and is initially uniform in temperatureat 300◦C. If it is…

A: Lumped system analysis assumes a uniform temperature distribution throughout the body, which implies…

Q: A long circular cylinder is encased and centered in a long square cylinder of concrete (k 1.2 W/m·K)…

A: Given , Thermal conductivity,k=1.2W/mKTemperature of cylinder,T1=200°C=473KTemperature of…

Q: A spherical object at 10 °C was taken into a bath at 60 °C. The core temperature-time values ​​of…

A: Answer: Initial temperature of the spherical object, T0 = 10°C = 283 K Bath temperature, T∞ = 60°C =…

Q: Steam at 140 ° C flows in a pipe having an inner radius of 45 mm and an outer radius of 55 mm. The…

A: The rate of heat transfer through a pipe is calculated as, Q=Ti-To1Aihi+ln(ro/ri)2πkwL+1Aoho Where,…

Q: A horizontal tube (inner and outside diameters are 2.0 cm and 2.5 cm respectively). is used as…

A: Given, 1Uinner=0.005 (m2–K)/W 1Uoutside=0.008 (m2–K)/W  1Uoverall=1Uinner+1Uoutside…

Q: Water available at 24 C is heated by a heating element having 30 mm outside diameter and 0.4 m…

A: Cp=4180J/kg.∘C k=0.64W/m∘C density(r)=988kg/m3 μ=0.55×10-3N-S/m2 Ts=80∘C length=0.4m do=30mm=0.03m…

Q: A steam pipe with 80 mm diameter passes through a room at 25°C (both air and walls). The pipe is…

A:

Q: Air at 2 bar and 40°C is heated as it flows through tube of diameter 30mm at a velocity of 10 m/s.…

A: Given, Pressure P = 2 bar Velocity = 10 m/s

Q: The gas at an average temperature of 180 oC is transported through a steel (steel-46 W/m2.K) pipe…

A:

Q: Air at 20°C blows over a 50 x 75 cm hot plate made of carbon steel (AISI 1010) with 2 cm thickness.…

A:

Q: The gas at an average temperature of 180 oC is transported through a steel (steel-46 W/m2.K) pipe…

A: Heat transfer takes place from a steel pipe through conduction and convection.

Q: Q/ The heat transfer rate q over a surface is given by dT 9 = -KA= dy where k = thermal conductivity…

A: Given  K = 0.0125 J/ s .m. k Area  A = 2.5 m2 At y = 1.5

Q: A certain matenial 2.5 em thick, with a cross-sectional area of 0.1 m, has one side maintained at…

A: Given, T3=95oC,T2=62oC,T1=35oC,∆x=0.025 m Assume Linear variation of thermal conductivity,…

Q: The walls of the refrigerated storage room are 10 m long and 3 m high and constructed with 100 mm…

A: Given data: Thickness of concrete blocks = 100 mm Thermal conductivity of concrete blocks = 0.935…

Q: Heat is negative when when transferred from the system to the surroundings True False

A: Heat: It is a form of energy which transfers from hotter body to colder body by thermal radiation.…

Q: 1. Assume steady-state conditions and a thermal conductivity of k 1.5 W/m-K. a. Determine the…

A: Heat Transfer: It is normally from a high-temperature object to a lower temperature object. This has…

Q: A 3-inch Sched 40 steel pipe has a thermal conductivity of k = 15 W/m ° C covered with a 2.5 cm…

A: Given data: Dimension of pipe = 3 in schedule 40 kpipe = 15 W/m.0C Thickness of insulating material…

Q: Liquid food is heated in a tubular heat exchanger. The inner pipe wall temperature is 110 ° C. The…

A:

Q: Steel pipe 3 cm thick, 1.0 m long and 10 cm deep, covered with 6 cm thick insulation. The wall…

A: Given data: Thickness of steel pipe = 3 cm Length of pipe = 1 m Depth of pipe= 10 cm Thickness of…

Q: Water flows through a pipe at an average temperature of 7-50°C. The inner and outer radii of the…

A: Given: The pipe has an inner radius of r1 = 6 cm and outer radius ry = 6.5 cm, The average…

Q: A house has a composite wall made of wood, fiberglass insulation, and gypsum boards. On a cold…

A: The concepts used to solve this problem are heat transfer, equivalent thermal resistance, and heat…