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Select the number and arrangement of 3 4 -in. -diameter A325-N high-strength bolts required to resist an axial tensile load of 150 kips for the butt joint shown. The plates are all ASTM A36 steel. Indicate the bolt arrangement with a sketch.
A swimmer with body mass 50 kg is pulled from the ocean with hypothermia. Her body temperature is 27°C. She is connected to a shell and tube heat exchanger. Blood flow through the device is kept constant at 1,000 ml/min. The perfusionist adjusts the ..
A hydrogen/oxygen fuel cell stack produces 100 kW of DC power at an efficiency of 60% with water vapor as the product. Determine the hydrogen mass flow rate in g/s and the required cell voltage.
the maximum allowable temperature of a working fluid is usually determined by metallurgical considerations. in a
design a symmetric 4-bar mechanism optimized for a constant velocity of 150 insec over a straight line motion of 8 such
Why is a green filter used?
Which materials are listed as highly susceptible to hydrogen embrittlement?
A Parshall flume is placed in a small stream to measure the discharge.
(Spherical polar coordinates) When a function f(r) is specified in polar coordinates, it is usual to express grad f in terms of the partial derivatives of f with respect to r, θ and φ and the unit vectors ur, uθ and uφ in the directions of increas..
a rigid insulated tank that is initially evacuated is connected through a valve to a supply line that carries helium at
Air undergoes a polytropic process in a piston cylinder from p1=1bar, T1=295K to p2=7bar. The air is modeled as an ideal gas and kinetic and potential energy effects are negligible. For a polytropic exponent of 1.6, determine the work and heat transf..
The processable area on a 156-mm-diameter wafer is a 150-mm-diameter circle. How many square IC chips can be processed within this area, if each chip is 7.5 mm on a side? Assume the cut lines (streets) between chips are of negligible width.
What are the payback periods for these machines? Should either, both, or neither machine be purchased, based on the payback periods? The required payback period for investments of this type is three years.
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