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The plain concrete beam shown having a rectangular cross section 10-in. wide and 18-in. deep is simply supported on a single span of 20 ft. Assuming no loads other than the dead load of the beam itself, find the bending stresses that exist at mid span.
a gas is contained in a vertical frictionless pixton-cylinder. the piston m 10 kg a- 7.5 x 10-3 m2 is attached to a
a trailer truck enters a 2 percent uphill grade traveling at 72 kmh and reaches a speed of 108 kmh in 300 m. the cab
A material with a true stress strain curve? = 350 E0.25 MPa is used in wire drawing. Calculate the maximum reduction in cross sectional area per pass based on ideal conditions.
a petrol engine uses 204 kg of petrolh of calorific value 43 mjkg. the thermal efficiency of the engine is 20.
a mass of 0.20 kg of saturated refrigerant-134a is contained in a piston-cylinder device at 200kpa. initially 75 of the
a. calculate the density of air in lbmft3 at standard conditions 75f and 14.7 psia assume m 28.9 lbmlb-mol.b.
Explain why it is difficult to validate a reusable component without the component source code. In what ways would a formal component specification simplify the problems of validation?
steam at 1 bar enters an adiabatic heat exchanger with a quality of 0.89 and exits as a saturated liquid. the steam is
Determine the force exerted by the deltoid muscle on the upper arm at A and the x- and y-components of the force reaction at the shoulder joint O
an ideal diesel cycle with air as the working fluid has a compression ratio of 20 and a cutoff ratio 2.1. at the
A Carnot heat pump is to be used for heating house in winter. The house temperature is set at 25oC. One day the outdoor temperature is 2oC. The house is estimated to lose heat at a rate 55000kJ/h (which equal to Qout of the heat pump).
a single-pane glass window is used in a heated dwelling. outside the dwelling the ambient temperature is 0degc while
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