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Derive an expression for the time at which the response of a critically damped system will attain its maximum value. Also find the expression for the maximum response.
an office building is found to gain 200000 btuh of heat on a hot summer day over the period from 6 a.m. to 6 p.m. the
a wheel can be modeled as a thin ring having mass 10 kg and four spokes made of slender rods each of mass 2 kg. the
consider two reversible refrigerators operating in series. the first refrigerator removes heat at the rate of 250 kw
at standard atmospheric temperature and pressure 25 c and 1 atm how many moles of dry air be present in a room having a
Determine the torque T required to overcome the fluid resistance and rotate the tube with a constant angular velocity of w. Assume the velocity profile within the liquid is linear.
fully developed laminar flow occurs in a pipe line. the fluid in the pipeline has a dunamic viscosity of 0.08 nsm2 and
Flow of a fluid in a network of tubes (Fig. 2B.12), a fluid is flowing in laminar flow from A to B through a network of tubes, as depicted in the figure. Obtain an expression for the mass flow rate w of the fluid entering at A (or leaving at B) as..
A 25-mm-diameter, high-tension line has an electrical resistance of 10-4 !1/m and is transmitting a current of 1000 A. If ambient air at 10°C and 5 m/s is in cross flow over the line, what is its surface temperature?
Determine the thickness of the 1.09m inside diameter pilot sphere (assume 4130 steel with ultimate tensile strength of 1,234MPa and a 200% factor of safety). The depth at which the sphere will fall is 10,908 meters.
As the hollow steel (G = 77 GPa) shaft shown rotates at 180 rpm, a stroboscopic measurement indicates that the angle of twist of the shaft is 3°. Determine
geothermal steam is planned as an energy source for power generation. the steam enters and adiabatic exchanger at 2
Circulating a steady state turbine 20000 kg / h of steam at 4 bar entering and 440 ° C and leaves at 0.20 bar and 90% quality. A heat of 20 kJ / kg is lost. The inlet has a diameter of 8 cm and the output section is rectangular, of dimensions 0.9 m ..
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