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Derive an expression for the heat loss conductance Uc for a flat-plate collector in which convection and conductance are completely eliminated in the air layers by use of a hard vacuum.
at t0 a disk with mass 3kg is placed on a spinning platform. the disk slides and begins to accelerate. if the maximum
a pressure delta p of 50 psi is to be applied to a pipe roughness e0.01 inches length l500 feet to generate a required
These parts should be within the specification limits 10.45 inches to 10.55 inches, with a target of 10.50 inches. Are both processes capable of staying within the specification limits? If you were a manufacturer and had to select one of these pro..
A small sphere with mass 5.00.×10?7kg and charge +3.00?C is released from rest a distance of 0.550m above a large horizontal insulating sheet of charge that has uniform surface charge density ?=+8.00pC/m2.
design 2-shell pass and 8-tube pass heat exchanger for heating ethyl alcohol from 25degc to 70degc at a rate of 2.9
the cost of sending a package by an express delivery service is s12.00 for the first two pounds and 4.50 for each pound
A smooth circular cylinder of weight W and radius R rests in a V shape groove whose sides are inclined at angles a and b to the horizontal as shown. Find the reactions RA and RB at the points
A stream containing 57 mol % n-Octane and the remainder Ethylene is to be separated by flash distillation. The molar flow rate of the stream is 823 mol/hr. The temperature and pressure of the stream entering the flash drum are 105°C and 325 kPa. De..
A heat pump with a coefficient of performance of 3.8 provides energy at an average rate of 75,000 kJ/h to maintain a building at 21oC on a day when the outside temperature is 0oC. If electricity costs 8 cents per kW. h. Determine the electric power r..
steam enters the first stage turbine at 40 bar and 500c with a volumetric flow rate of 90 m3min. steam exits the
What are several things you as an individual can do to reduce energy use in your home? While meeting your transportation needs? How is it possible for the temperature of air trapped in a balloon to increase? To decrease? Why is it incorrect to say th..
Determine the minimum diameter of a solid shaft used to transmit 500 kw of power from a 3000-rpm motor so that the shear stress does not exceed 50 MPa
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