What is the heat-loss rate through the floor
An 14 m by 8.5 m house is built on a concrete slab 27 cm thick. What is the heat-loss rate through the floor if the interior is at 28 degrees celcius while the ground is at 18 degrees celcius?
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The wall is 0.12 m thick and has an area of 9.9 m2. Assume that one kilowatt · hour of electrical energy costs $0.15. How many hours are required for one dollar's worth of energy to be conducted through the wall?
a) Write down the time dependent schrodinger equation for an electron trapped in a one-dimensional infinite potential well of 130 pm wide
A piece of copper at 320 degrees celcius is dropped into 1.9 kg of water at 16 degrees celcius. If the equilibrium temperature is 21 degrees celcius , what is the mass of the copper?
An electric heater in the tank transfers energy to the water at a constant rate of 60 W. Find the time, in hours, when the temperature reaches 200° C.
Based on your confidence interval, is it reasonable to assume that 99% of pipes have surface roughness measurements that fall in that interval? Briefly explain your answer.
The critical stress (in MPa) required for crack propagation is 17.9MPa, calculate the specific surface energy of this brittle materials.
A 0.072m X 0.045 m steel beam of length 3.7m is heated from 293Kelvin to 372Kelvin. What is the new length of the beam? What is the strain in the beam?
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