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Heat losses through windows in buildings are substantial. What percent reduction in heat loss would be mitigated by remplacing a window contaning a single pane of glass with ( a) double pane low E insulating glass or (b) a 3- inch thick sheet of expanded polysterene sheet? the quoted R values for theses items are :
- single pane of glass -0.90 ft^2 hr F/Btu-double pane of low E insulating glass -2.3 ft^2 F/Btu-1 inch sheet of polystyrene sheet-4.0 ft^2 hr F/Btu
a 70kg rectangular door measures 1.2m wide by 2.3m tall. it closes automatically using two hinges with torsional
a 25 ft long standard steel steam pipe is installed at 60 degrees f. the pipe temperature increase to 220 degree f when
refrigerant 134a enters the capillary tube of a refrigerator as a saturated liquid at 0.8 mpa and is throttled to a
two kilograms of refrigerant134a initially at 2 bar and occupying a volume of 0.12 m3 undergoes a process at constant
a massive precisely machined 6-ft-diameter granite sphere rests upon a 4-ft diameter cylindrical pedestal as shown in
A solenoid 2.8 m long has a radius of 0.85 cm and 660 turns. It carries a current I of 2.5 A. What is the approximate magnetic field B on the axis of the solenoid?
in an air-standard otto cycle the air at the beginning of the compression stroke is at 95 kpa and 22 degrees c and the
a 1.8 m x 1.5 m composite wall separates a furnace from the rest of the room in which it is located. the wall is made
if the velocity of a 1 id pipe is determined to be 0.2 fts by a transit time flow meter what if the volume flow rate?
an ideal gas carnot cycle with air in a piston cylinder has a high temperature of 1200 k and a heat rejection at 400 k.
water at 15degc is to be discharged from a reservoir at a rate of 18 ls using two horizontal cast iron pipes connected
DOF system and Find the differential equation describing the system
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