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A 50-mm-by-300-mm scaffold timber plank, placed flatwise, must carry a uniformly distributed line load of 1.50 kN/m without exceeding an allowable bending stress of 11.0 MPa and an allowable shear stress of 0.83 MPa.
Calculate the maximum allowable simple span length. Use full nominal dimensions and neglect the weight of the plank.
a 2 m3 tank containing nitrogen at 25oc and 500kpa is connected through a valve to another tank containing 3kg of
A “friend” asks you to construct the phase diagram for a new binary alloy of A and B. The clues are: (i) A and B are completely immiscible in each other and no solid solutions exist in the diagram, (ii) no stoichiometric compounds exist in the diagra..
nitrogen gas is compressed from an initial state of 100kpa and 17c to a final state of 600 kpa and 57c. determine the
for a metal that has the simple cubic crystal structure calculate the atomic radius if the metal has a density of 8.38
for a specimen under fatigue test with a maximum stress of 150 mpa tensile stress and a minimum stress of -20 mpa
Make a histogram of the individual data and estimate µ and σ as outlined in the chapter. If you decide to measure the weight characteristics, you can check your estimate of µ by weighing all the M&Ms together and dividing by the total number of M&..
Both the air and the water are at 20°C. At what speed should they run the water in the water tunnel, and at what rpm should they spin their
which emits more sox per unit amount of electricity produced a coal-fired plant with a 90 efficient so2 scrubber or an
0.5 kg of air, contained inside a piston-cylinder device, with an initial pressure of 6 bar and initial volume of 0.15 m3 undergoes a thermodynamic cycle consisting three processes as follows:
a truck travels 60 mph on a smooth hosizontal road. the frontal area of the truck is 100 square feet. the air
Consider just the vertical (y) response of the system when the beam is being stretched. Show that the spring constant, ka, is approximately 70.6 mN/m. What is the steady state amplitude of the vertical response? See Figure A below for an engine..
consider a pefc operating with the following specifications 80 and the pressure is 2 atm at the anode and 20 and the
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