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A thermopane window consists of two pieces of glass (k = 0.78 W/m/K) 7 mm thick that enclose an air space (k = 0.026 W/m/K 7 mm thick. The window separates room air at 20?C from the outside air at -10?C. The convection coefficient associated with the inner (room-side) surface is 10 W/m2?K, while that associated with the outer (ambient air) side is 80 W/m2?K. Assume that the air enclosed between the panes is stagnant and that radiation may be neglected.What is the heat transfer through a window which is 0.8 m long by 0.5 m wide?
In flows past solid bodies, the force exerted on the body by the fluid motion depends upon the fluid velocity u, the density p, the viscosity
A 10 kW electric heater is used to heat 2 kg of air contained in an insulated rigid tank from 400 kPa and 50 °C to 200 °C. The ambient air temperature and pressure is 20 °C and 100 kPa, respectively.
A refrigerator with a COP of 3 removes 1.5 kW from the cold space at -9 °C while rejecting heat to the kitchen at 22 °C.
a force of 3 n stretches a spring by 1 m. a mass of 4 kg is attached to the spring. at t0 thenbspmass is pulled down a
design of a vacuum distillation plant for purification of glycerin by-product from a biodiesel plant.
Define- hydraulic mean radius, hydraulic dept, section factor and most efficient dhannel cross section.
An unsuited free diver can work in a pressure of up to 490KN/m^2 and a suited diver in pressure of up to 1815 KN/m^2. Calculate the maximum depths at which they might work in sea-water which has a specific gravity of 1.03.
A tensile specimen of cartridge brass sheet has a cross section of 0.320 in. × 0.120 in. and a gage length of 2.00 in. Calculate the engineering strain that occurred during a test if the distance between gage markings is 2.35 in. after the test.
Important information about Pressure Cooker, Steam is leaving a pressure cooker whose operating pressure is 30 psi. It is observed that the amount of liquid in the cooker has decreased by 0.4 gal in 45 minutes after the steady operating conditions..
In the gear-and-shaft system shown, the shaft diameters are dab= 2 in. and dcd=1.5 in. Knowing that G = 11.2 x10^6 psi, determine the angle through which end d of shaft cd rotates.
Use Lagrange"s equations to derive the EOM for the system. You have a function L of some What are Lagrange"s Equations?
For a pump in the basement which must deliver water to a bucket on the floor of the upper mechanical room, what is the minimum pressure in psig you will see at the pump discharge.
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