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A seesaw weighing 3 lb/ft of length is occupied by two children, each weighing 90 lb (see figure). The center of gravity of each child is 8 ft from the fulcrum. The board is 19 ft long, 8 in. wide, and 1.5 in. thick. What is the maximum bending stress in the board?
A pump is used to raise the pressure of water from 0 psig to 55 psia. How much power (in kW) will be required to pump 1.5ft3 /s of water? What is the effect of the water temperature on the pump power that is required?
measurements of drag force are made on a model automobile in a towing tank filled with fresh water. the model length is
Develop an analysis to predict the convection heat transfer rate across the window as a function of pane spacing and determine, under otherwise identical conditions, whether air or car- bon dioxide will yield the smaller rate..
Discuss some of the circumstances where mechanical ventilation is required in the welding standards.
air is expanded in an adiabatic nozzle by a reversible polytropic process with n 1.3. it enters this nozzle at 100
two ideal gas with gas constant 0.287 kjkg.k flows are combined to a single flow in a mixing chamber. one flow is 1 m3s
Detemine if the ball bounces down the steps without skipping any step and if the ball bounces down the steps without bouncing twice on the same step.
assume ends of bar in 5-7 have been kept constanst at 100 degrees c for a long time. then at some instant t0 the
Capability to reuse code
Compute the fugacities of ethane and n-butane in an equimolar mixture at 373.15K at 1, 10, and 15 bar total pressure using the viral equation of state.
How is the mechanical deformation energy defined? How do you calculate the work of fracture of a brittle material?
A car accelerates uniformly rest to 81 ft/s over a distance of 700 ft along a curve of 800ft radius .Determine the magnitude of the total acceleration at the instant that speed of 81ft is reached.
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