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The elements of a new method for constructing concrete foundation walls for new houses are shown in the figure. Once the footing F is in place, polystyrene forms A are erected and a thin concrete mixture B is poured between the forms.
Ties T prevent the forms from separating. After the concrete cures, the forms are left in place for insulation. As a design exercise, make a conservative estimate for the uniform tie spacing d if the tension in each tie is not to exceed 6.5 kN.
The horizontal tie spacing is the same as the vertical spacing. State any assumptions. The density of wet concrete is 2400 kg /m3.
consider steady flow of a constant-property fluid in a long duct formed by two parallel planes. consider a point
Pumps are generally used to increase the pressure of a liquid. This is done by converting rotating shaft work (within the pump) into mechanical energy (of the liquid). Within such a pump, the energy of the liquid is being increased by 4.95 kW, while ..
If the flow of 0.10 m3/s of water is to be maintained in the system shown, what power must be added to the water by the pump? The pipe is made of steel and is 15 cm in diameter
An angled jet of water comes out from the ground at 3 m/s at a 45o angle from the horizontal. How high does the water reach? How fast is it going when it reaches back down to the ground? State your assumptions clearly and draw a sketch of how you ima..
suppose a satellite in geosynchronous orbit has just passed above the international space station with respect to the
an air conditioner can produce a 120 kjmin cooling effect while rejecting 2.5kw of heat. what is its cop and the
a certain process requires 2.3 cubic feet per second of water to be delivered at a pressure of 30 psi. this water comes
design a worm gear set to reduce the speed of a 1475 rpm electric motor to approximately 60 rpm and apply 170 nm torque
One-half kilogram of pure water is heated in a frictionless piston-cylinder device, at a constant pressure of 200 kPa, from an initial temperature of 20oC to a final temperature of 400oC.
A rigid insulated container has two rooms separated by a membrane. Room A contains 1 kg air at 200oC and room B has 1.5 kg air at 20oC, both rooms at 100 kPa. Consider two different cases
For spherical sand particles with Dp = 0.045 inches and the density of each particle is 145 lbm/ft3, estimate the minimum fluidizing velocity for air and for water. Assume a porosity of 32 percent. You may need to rederive Equation 11.41 considering ..
you are swinging your younger sister in a circle of radius .9m. if her mass is 24kg and you arrange it so she makes one
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