Heat conduction Definition and 107 Threads

Sir, 1) Two spheres of different materials, one with double the radius and 1/4th wall thickness of the other are filled with ice. If the time taken for complete melting of ice in the large sphere is 25 minutes and that in smaller sphere is 16 minutes, what is the ratio of the thermal...

Help with Heat Conduction Question My question is: These days they reinforce concrete walls with steel bars. Would the steel bars enhance or degrade the insulating value of the concrete wall? Explain? Metal is a good conductor and concrete is a good insulator. My answer so far is that it...

Given the 3-D rectangular solid with sides of length a, b and c in the x, y and z direction respectively. Find T(x,y,z) in the interior of the solid when laplace T = 0 Boundary condition are following conditions: 1) x=0, T=0 2) x=a, dT/dx=0 3) y=0, dT/dy=0 4) y=b, dT/dy=0 5) z=0, T=0 6)...

A styrofoam cooler (K = .030 W/mo C) has an average surface area of 0.465 m2 and an average thickness of 2.0 cm. About how long, in seconds will it take for 4.10 kg of ice at 0oC to melt in the cooler if the outside temperature is 28.0oC? delta Q/delta t = (k*A*deltaT)/d delta Q = 333 J/g...

I'm doing a projekt on heat conduction i a box. The point is to simulate a house very simple. We have time varying temperature conditions on the outside, and want to model the temperature inside the box over time as outside temperature changes. The box will consist og an outer wall, insulation...

Hello friends I have a problem and also know its answer but I have some trouble figuring it out. Here goes Two vessels filled with different liquids are at temperatures T_{1} and T_{2} respectively. They are joined by a metal rod of length l; area of cross-section A and thermal...

How can I calculate BTU value generated from 1 inch copper pipe with the length of 1 foot through which 176F hot water is passing?