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The table below gives the frequency distribution of the daily commuting time (in minutes) from home to work for all 40 employees of a company. Complete the table and find the variance and standard deviation.
Class frequency(f) 5 - 15 316 - 26 827 -37 938 -48 1049 -59 660 -70 4
0.12 kg of argon fills a 0.038 m3 weight-piston-cylinder device at 445 kpa. the piston is now moved by decreasing the
electronic components mouted on a flat plate are cooled by convection to the surroundings and by liquied water
descriptive questions - give brief answers in words. no calculations are required. you may write your answers in point
The concrete block shown has wall thicknesses of 40 mm, voids that are 95 mm×110 mm 190 mm×390 overall. Calculate the moment of inertia about the centroidal X-X axis.
a construction tower crane lifts a 10 ton bundle of steel beams 100 feet in the air in 30 seconds. a how much work does
Air enters a 3600-kW turbine operating at steady state with a mass flow rate of 18 kg/s at 800oC, 3 bar and a velocity of 100 m/s. The air expands adiabatically through the turbine and exits at a velocity of 150 m/s.
an irrigation pump is used to draw water from a reservoir and deliver it to an irrigation ditch at a mass flow rate of
Determine the final pressure and the heat transfer, in kJ/kg, associated with the process.
steam enters a two-stage adiabatic turbine at 8 mpa and 550ordmc state 1 and is expanded to 2 mpa state 2 in the first
Determine the entrance temperature and the entropy production rate of the contraction. Assume the air to be an ideal gas with constant specific heats.
Determine, by means of the Navier-Stokes equations, the relationship between the thickness of the layer and the discharge per unit width. The flow is laminar, and assume air resistance is negligible so that the shearing stress at the free surface ..
A water tank consists of a cylindrical part of radius r and height h and a hemispherical top. The tank is to be constructed to hold 600 m3 when led. The surface area of the cylindrical part is 2 rh, and its volume is r2 h. The surface area of the hem..
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