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1.A man has a mass of 100 kg. how much pressure would he apply to an I-beam if his shoes each have an area of 50 cm? what is his normal force?
2,Briefly describe the differences between Metals, Polymers and Ceramics in terms of molecular bonding. Which of the material from the above three would you select for strengthening the floor of an elevated platform on which industrial machinery, which generates impacts and vibrations, is located and why? Please provide detailed solutions, steps and explanations
A simple truss with joint detail is shown at the left. determinethe required diameter of the pin at joint B if a factor of safetyof 1.8 with respect to shear yielding is required, and the pn is tobe made of steel having shering stress of 145 MPa
A chemical is added at the beginning of a water treatment plant at a dose of 750 lb/day. The water treatment plant provides water to a community of 200,000 people and the average water consumption in the city is 110 gallons per capita per day (gpc..
Q. What is the main objective of NASA's Mars Science Laboratory (MSL) mission? When was it launched and when and where is it scheduled to land on Mars? Explain the major differences between this mission and Mars Exploration Rovers (MER) mission?
The settlement analysis for a proposed structure indicates that 6cm of settlement will occur in 4 yr and that the ultimate total settlement will be about 25cm. estimate (a) the ultimate total settlement and ..
Water at 20ºC flows at a velocity of 2 m/s in a 200-mm diameter horizontal ductile-iron pipe. a) Estimate the friction factor in the pipe, and state whether the pipe is hydraulically smooth or rough
A significant obstacle in the design of atomic weapons is theso-called delta phase instability (a type of mixed dislocation) inPu-239. This is the problem: We wish to construct a sphericalatomic bomb core out of pure delta phase (f.c.c.) Pu-239. A de..
Also calculate the deflection of the beam to check that it complies with the design limit of L/200. Only variable actions are required for deflection check.
For a mixed liquor volatile suspended solids (MLVSS) of 1800 mg/L, what is the total return solids flow rate?
A steady fire with an energy release rate of 500 kW occurs in a room 3m wide, 3m long, and 2.4 m high, with a door opening which is 1.8 m high and 0.6m wide. the ambient temperature is 20 degree celcius.
45 ft wide, and 14 ft deep and treats 10 mgd. The power input to provide paddle-blade velocities of 1.0 and 1.4 fps for the inner and outer blades, respectively, is 930 ft'lb/s.
At a certain location along the span, a reinforce concrete beam section with d=14 in. and b=10 in. is subject to a design shear of Vu=50k. Using No.4 stirrups, compute the required stirrup spacing at the given location. assume F'c=3 ksi and Fy=40 ..
A cylindrical rod of 1040 steel originally 15.2 mm (0.60 in.) in diameter is to be cold worked by drawing; the circular cross section will be maintained during deformation
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