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1. A thermometer having an emissivity of 0.9 is placed in a large room and indicates a temperature of 25?C.The walls of the room are at 35?C and the convection heat transfer coefficient is 5.0 W/m2 · ?C. Calculate the true temperature of the air.
2. A stainless-steel sphere having a diameter of 3.0 mm is embedded with a copper constantan thermocouple and is suddenly exposed to air at 50?C with a convection coefficient of 20 W/m2 · ?C. The initial temperature of the sphere is 20?C. Plot the output of the thermocouple as a function of time. What is the time constant?
A 1.0-m rigid horizontal support is hung by two cables as shown. One cable is brass and The other cable is high-density polyethylene plastic. At room temperature (21°C), the cables measure 3.50 m vertically. When the temperature drops to 15°C, find t..
Sketch the function - Without calculation explain how does the Fourier series of f(x)(as derived in Question 1) differ from the Fourier series of g(x)? Explain why and Calculate the minimal
A 10cm long cylindrical rod of steel is elongated to become 12.1cm long by the application of a force of 10kN.
If we apply a breaking system to a skateboard while the speed of the skateboard is 5Milies per hour, the rider average weights is 180bounds while his height is 170 cm. You can assume the distance as it is 50meters.
A steam power plant, as shown in Fig. 9.3 operating in a Rankine cycle, has saturated vapor at 3.0 MPa leaving the boiler. The turbine exhausts to the condenser operating at 10 kPa. Find the specific work and heat transfer in each of the ideal com..
Research the various aspects that I'm going to include in my assignment by referring relevant books and journals and the notes of subject - must include the case studies that shows the positives in Indian construction when compared to construction..
estimate the time it takes to bring the water to 50?C. Make enough simplifying assumptions so that you can solve the problem mathematically, that is find a formula for T(t).
Air enters an adiabatic nozzle steadily at 300 kPa, 200 o C, and 30 m/s and leaves at 100 kPa and 180 m/s. The inlet area of the nozzle is 80 cm 2 . Determine (a) the mass flow raw through the nozzle, (b) the exit temperature of the air, and (c) the ..
A HEPA (high efficiency particulate air) filter is monitored periodically for replacement. Specifications state that if the pressure drop across the filter exceeds 1 inch of water, the filter should be replaced.
What is line of balance scheduling technique in project management
A four story office building ha interior columns that are spaced 30ft apart in two perpendicular directions. If the flat-roof loadingis estimated to be 30 lb/ft2 , determine the reducedlive load supported by a typical interior column at ground level.
A NaOH solution has pOH at 8. How much volume of this NaOH solution is needed to prepare 1 L of a NaOH solution at pOH at 9.
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