The inner surface of a 2 inch wall is 70C and its outside surface temperature is 34C. Determine the steady state heat transfer, in Watts, through the 2 ft x 2 ft wall. The thermal conductivity of the wall is 1.4 W/m-K. C. 370 a. 350 0. 360 d. 380

The inner surface of a 2 inch wall is 70C and its outside surface temperature is 34C. Determine the steady state heat transfer, in Watts, through the 2 ft x 2 ft wall. The thermal conductivity of the wall is 1.4 W/m-K. C. 370 a. 350 0. 360 d. 380

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 2.60P

See similar textbooks

Related questions

Q: A uniform rod AB of mass m = 6.4kg is welded at its midpoint G to a vertical Shaft GD. Knowing that…

A: Component of w along xdash axis, W'=wcos(20°)=5.7*Cos(20°)=5.36rad/s

Q: Bowen ratio is estimated to be about 0.2. Estimate the sensible heat and latent heat fluxes to the…

A: Ratio=HHL=0.2 RN=800W/m255m deepMixed ocean =0.12°C Sea surface =27°C To-Find:- Sensible and latent…

Q: Find the radius of a closed cylinder filled with a 500 g liquid that has a bottom pressure measured…

A: unit of pressure is kg/m2 and not kg/m3.

Q: The compression ratio in a Diesel engine is 13 and the expansion ratio is 6.5. At the beginning of…

A: The cutt-off ratio of the diesel cycle can be determined as shown below. Here, r is the compression…

Q: 25. Suppose the mass m = 400 grams, as shown, moves to the left at 10 m/s. It strikes the spring and…

A: Option c is correct.

Q: PROBLEM 1.2 Two solid cylindrical rods AB and BC are welded together at B and loaded as shown.…

A: The diameter of the small shaft can be determined as shown below.

Q: A compound bar consisting of bronze, aluminum, and steel segments is loaded axially as shown in the…

Q: 8. The weight density of a soil is given by y = 15+ 0.75h, where y is in KN/m³, and h is in meters.…

A: Given: Weight density of the soil, y= 15 + 0.75h, where y is in kN/m^3 and h is in meters. Depth, h=…

Q: Determine the x- and y-coordinates of the centroid of the shaded area shown. 3", 3" -1.75 1.75" 8" 3…

A: coordinates of centroid of the shaded area.

Q: Determine the reactions of the beam as shown below. 3 m 10 kN/m 10 kN/m + sign A В НА 6 m VA VB A.…

Q: A triangular plate shown in the figure is submerged in oil, specific gravity = 0.83, 3.89 m below…

Q: 9. A ball falls to the floor. When it is 1.70 m above the floor, its potential energy exactly equals…

Q: 1. Det.moment of inertia. Y 3" r= 3" 1" 2"

Q: Determine the reactions at A and B on the Fink truss shown in figure below. Members CD and FG are…

Q: Show Computation

Q: A regular tetrahedron of side length 0.5 m has black internal surfaces with the following…

A: Given, Side length = l = 0.5 m Q1 = 0 W Q4 = 400 W T2 = 500 K T3 = 1000 K Let us take the…

Q: Air at a temperature of 195oC and a pressure of 500 kPa enters a smooth insulated nozzle with an…

Q: A flanged bolt coupling consists of eight d-mm diameter steel bolts on a bolt circle 275 mm in…

Q: Question 2 A helical compression spring is to be made of oil-tempered wire of 4-mm diameter with a…

A: Disclaimer: “Since you have posted a question with multiple sub-parts, we will solve the first three…

Q: How many degrees of lom are required to model the systems shown in Identify a set of generalized…

Q: y 165 mm 165 mm 135 mm: 130 mm 75 mm 130 mm Answers: (X, Y) = (i ) mm

Q: The steel shaft with two different diameters rotates at 4.3 Hz. The power supplied to gear C is 48.5…

Q: Q3/ For the figure shown below, compute the centroid of the figure. 6m 4.5 m

A: find the coordinate of centroid of the shaded area.

Q: The flow rate of the system is 1 cubic meter per second. Determine the major and minor losses of the…

A: The flow rate of the system, Q=1 m3/s=35.3147 ft3/s 1…

Q: A flanged bolt coupling consists of eight d-mm diameter steel bolts on a bolt circle 263 mm in…

A: Given data as per the question 8 d-mm bolt on 263 mm bolt circle 4 d-mm bolt on concentric bolt…

Q: The compound shaft carries the two torques shown. The shear moduli are 28 GPa for aluminum, 83 GPa…

Q: Determine the moments of inertia about the y-axis of the circular area without and with the central…

Q: The tank with hexagonal cross-section shown is fabricated from 1/8-in steel plate. Calculate the…

A: INTRODUCTION : The hoop stress is the stress created by fighting the bursting effect of the imposed…

Q: At what temperature in °F at which liquid water has the highest density?

A: Ans) 39.2 F

Q: Air with an initial density of 1.285 kg/m³ is passed through a compressor with an inlet diameter of…

Q: Determine the coordinates of the centroid of the trapezoidal area shown. Assume a = 375 mm, b = 545…

Q: Determine the x- and y-coordinates of the centroid of the shaded area. 50 -145- 50 145 Dimenions in…

Q: The following properties for Freon-12 were obtained. At -22 °C h (superheat) = 353 KJ/kg ha = 343…

Q: Calculate the y-coordinate of the centroid of the shaded area. The triangle is equilateral. 30 71 91…

Q: A triangular plate shown in the figure is submerged in oil, specific gravity = 0.84, 3.99 m below…

Q: 5) Refrigerant-134a at 320 kPa and 40°C undergoes an iso- thermal process in a closed system until…

Q: 2/ Determine the forces at the pin joint (F) and the roller support (G) ? 20 KN 30KN 2m B 2m D 2m

A: find the reaction at pin joint F and the roller support G.

Q: Water is the working fluid in an ideal regenerative Rankine cycle with one open feedwater heater.…

Q: At a temperature of 22.8 °C a 0.44-mm gap exists between the ends of the rods shown. At a later time…

Q: A flanged bolt coupling consists of eight d-mm diameter steel bolts on a bolt circle 268 mm in…

Q: 7. A Camot engine uses air as the working substance, receives heat at a temperature of 315°C, and…

Q: Q3/ For the figure shown below, .compute the centroid of the figure 6m 3m 4.5 m

Q: Properties of Carbon Dioxide: h@ 220 KPa and -5°C 350 KJ/kg be@ 25°C = 223.65 KJ/kg hi @ 22°C =…

Q: d Bronze B Steel - b–

Q: Determine the magnitudes of all pin reactions for the frame loaded as shown. Assume F = 770 N, a =…

A: F= 770 Na= 635 mmb= 290 mmθ= 26∘ϕ= 65∘

Q: Prove that f(x) = (x – 1)² + (x + 1)² is an even function.

A: Given f(x)=(x-1)^2+(x+1)^2 Then find f(-x)=(-x-1)^2+(-x+1)^2 f(-x)=(x+1)^2+(1-x)^2=(x+1)^2+(x-1)^2…

Q: 16. The purpose of an evaporator pressure regulator is to A. bypass liquid line refrigerant around…

A: The purpose of an evaporator pressure regulator is to _______ Answer: B. control evaporator…

Q: In a natural gas-pipeline compressor 110m3 /min propane is compressed polytropically. The inlet…

Q: Determine the x- and y-coordinates of the centroid of the shaded area. y 530 150 60° 380 60° 190 265…

A: Given: R2 = 150mm α=60o

Q: The driveshaft of an automobile is being designed to transmit 233 kW at 3401 rpm. Determine the…

Concept explainers

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

Question

The inner surface of a 2 inch wall is 70C and its outside surface temperature is 34C. Determine the steady
state heat transfer, in Watts, through the 2 ft x 2 ft wall. The thermal conductivity of the wall is 1.4 W/m-K.
а.
350
с.
370
b.
360
d.
380

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

1.19 A cryogenic fluid is stored in a 0.3-m-diameter spherical container is still air. If the convection heat transfer coefficient between the outer surface of the container and the air is 6.8 , the temperature of the air is 27°C, and the temperature of the surface of the sphere is –183°C, determine the rate of heat transfer by convection.
Heat is transferred at a rate of 0.1 kW through glass wool insulation (density=100kg/m3) with a 5-cm thickness and 2-m2 area. If the hot surface is at 70C, determine the temperature of the cooler surface.
1.29 A spherical interplanetary probe with a 30-cm diameter contains electronic equipment that dissipates 100 W. If the probe surface has an emissivity of 0.8, what is its surface temperature in outer space? State your assumptions in the calculations.
2.38 The addition of aluminum fins has been suggested to increase the rate of heat dissipation from one side of an electronic device 1 m wide and 1 m tall. The fins are to be rectangular in cross section, 2.5 cm long and 0.25 cm thick, as shown in the figure. There are to be 100 fins per meter. The convection heat transfer coefficient, both for the wall and the fins, is estimated to be K. With this information determine the percent increase in the rate of heat transfer of the finned wall compared to the bare wall.
Show that the rate of heat conduction per unit length through a long, hollow cylinder of inner radius ri and outer radius ro, made of a material whose thermal conductivity varies linearly with temperature, is given by qkL=TiTo(rori)/kmA where Ti = temperature at the inner surface To = temperature at the outer surface A=2(rori)/ln(ro/ri)km=ko[1+k(Ti+To)/2]L=lenthofcyclinder
A pipe carrying superheated steam in a basement at 10C has a surface temperature of 150C. Heat loss from the pipe occurs by radiation (=0.6) and natural convection (hc=25W/m2K). Determine the percentage of the total heat loss by these two mechanisms.
3.16 A large, 2.54-cm.-thick copper plate is placed between two air streams. The heat transfer coefficient on one side is and on the other side is . If the temperature of both streams is suddenly changed from 38°C to 93°C, determine how long it takes for the copper plate to reach a temperature of 82°C.
1.60 Two electric resistance heaters with a 20 cm length and a 2 cm diameter are inserted into a well-insulated 40-L tank of water that is initially at 300 K. If each heater dissipates 500 W, what is the time required for bringing the water temperature in the tank to 340 K? State your assumption for your analysis.
1. A 1000-W iron is left on the iron board with its base exposed to the air at 20°C. The convection heat transfer coefficient between the base surface and the surrounding air is 35 W/m². °C. If the base has an emissivity of 0.6 and a surface area of 0.02 m², determine the temperature of the base of the iron. 2. The inner and outer surfaces of a 5-m x 6-m brick wall of thickness 30 cm and thermal conductivity 0.69 W/m °C are maintained at temperatures of 20°C and 5°C, respectively. Determine the rate of heat transfer through the wall, in W.
Consider steady heat transfer between two large parallel plates at constant temperature of T1 = 500K and T2 =300K that are L =2 cm apart. Assuming the surfaces to be black ( emissivity Ɛ = 1 ), determine the rate of heat transfer between the plates per unit surface area assuming the gap between the plate filled with atmospheric air, (b) evacuated, (c) filled with fiberglass insulation, and (d) filled with superinsulation having an apparent thermal conductivity of 0.00015 W/m.˚C.
Determine the net heat transferred by radiation from a 9-ft square hot plate to a cold plate of equal size that are parallel to one another, and 20 ft apart if the hot plate is oxidized steel at 700°F and the cold plate is dull brass at 175°F.Ans: 2,863 Btu/hr
The roof of a house is electrically heated. This roof is 6 m long, 8 m highwide and 0.25 m thick, and is made with a flat layer of concrete whose conductivityis ? = 0.8 ?⁄? ?. The temperatures of the inner and outer surfaces are15 and 4 °C, respectively, for a period of 10 hrs. Determine a) the reason for the lossof heat through the roof that night and b) the cost of that heat loss to the homeownerof the house, if the cost of electricity is $0.08/kWh.