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Use the direct-design method to compute the moments for the column-strip and middle-strip spanning perpendicular to the edge of the exterior bay of the flat-plate slab shown in Fig. P13-3. Assume the slab is 7½ in. thick and supports a superimposed dead load of 25 psf and a live load of 50 psf. There is no edge beam. The columns are all 18 in. square.
1. the contraption below has a face cam with an elliptic pro?le pushing a push rod against a spring. the face cam is
air enters a compressor operating at steady state at 1.05 bar 300 k with a volumetric flow rate of 12 m3min and exits
A drilled shaft in a medium sand is shown in Figure P10.9. Using the method proposed by Reese and O'Neill, determine the following: a. The net allowable point resistance for a base movement of 25 mm
at steady state a turbine is fed with 2 kgs of steam that has a pressure of 4 mpa and a temperature of 500 c .
A sail plane with a lift-to-drag ratio of 25 flies with a speed of 50 mph. It maintains or increases its altitude by flying in thermals, columns of vertically rising air produced by buoyancy effects of no uniformly heated air. What vertical airspeed ..
A parcel is lowered onto a conveyor belt that is moving at 4 m/s. If the coefficient of kinetic friction between the parcel and the belt is 0.25, calculate the time that it takes for the parcel to reach the speed of the belt.
consider a nuclear power plant that produces 1000mw of power and has a conversion efficiency of 30 that is for each
Estimate the surface temperature of the chip, Ts, if its heat dissipation rate is 30 mW.
a linear spring k is to be designed to stop a 20-mg railroad car traveling at 8km/h within 400 mm after impact. Find the smallest value of k that will produce the desired result.
a 20 kg object is pulled across a flat surface with a force of 100 n. the force is applied at a 30deg angle to the
Atoms are 1-dimensionally aligned with an inter atomic distance of 10nm. Let’s assume that the positive charge of the nucleus of the atom is infinitely large so that electrons are confined to a specific atom. Then, what wavelength photons are require..
When a material is subjected to a cyclic stress, large cracks grow more slowly than small cracks. The concept of a critical stress for crack propagation is only applicable to brittle materials. Materials will not break if the applied stress is kept b..
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