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An engineer is designing a hydraulic lift with a capacity of 10 tons. the moving parts of this lift weigh 1000lbf. the lift should raise the load to a height of 6ft in 20 seconds. This will be accomplished with a hydraulic pump that delivers fluid to a cylinder. Hydraulic cylinders with a stroke of 72 inches are available with bore sizes from 2 o 8 inches. Hydraulic piston pumps with an operating pressure range from 200 to 3000 psig are available with pumping capacities of 5, 10, and 15 gallons per minute. Select a hydraulic pump size and a hydraulic cylinder size that can be used for this application.
A polymer that contains internal flaws 1.5 mm in length fails at a stress of 30 MPa. Determine the plane strain fracture toughness of the polymer. Assume a polymer specimen of "infinite" width.
Assuming that carbonate species dominate the acid/base behavior of boh solutions and that no gas transfer occurs when they are mixed, determine the alkalinity and pH of the mixture.
Let X be a uniformly distributed continuous random variable ranging between 5 and 8, X ~ U[5 , 8]. Variable Y is a function of X: Y: h(X)= 2X^2+1 a. Determine the PDF of Y. b. Find the expected value of Y.
A 12%, $50,000 bond is offered for sale at $45,000. If the bond interest is payable monthly and the bond matures in 20 years, what nominal effective rates of return per year will the purchaser make on the investment
How many extractions are required to decrease the concentration of phenol below 100 mg/L in a wastewater containing 2000 mg/L of phenol if an ether-to-watewater ratio of 0.2 by volume is used in each extraction
A discharge from a power plant cooling tower has a temperature of 81 degrees C and flows into the stream at a rate of 3 cubic meters per minute. What is the temperature in the stream downstream of the cooling tower discharge
A gas containing 80% CH4 and 20% (by mole) He is sent through a quartz diffusion tube to recover the He. 20% by weight of the original gas is recovered and its composition is 50% He.
At the inlet, the pressure is 6 MPa, the temperature is 500 degrees C, and the velocity is 20 m/s. At the exit, the pressure is 0.5 MPa, the quality is 0.95(95%), and the velocity is 75 m/s. The turbine develops a power output of 2500kW.
a temperature probe moves with the velocity 2i+2j-3k through air. the temperature of air changes as T(x,y,z,t)=(2x^2-3y+z^3)cos(at). Find the rate of change of temperature measured by the probe.
A company manufactures a brand of light bulbs with a lifetime in month that is normally distribute with a mean=3 and a variance=1. A consumer buys a number of these bulbs with the intention of replacing them successively as they burn out.
Steam enters the turbine of a single vapor power plant with a pressure of 10 MPa and a temperature of 580 C and expands adiabatically to 6 kPa. The isentropic turbine efficiency is 85%.
Compute the maximum acceptable service load on an A36 steel plate tension member 1/4in.x12in. having a single line of holes parallel to the direction of loading. The load is 25% dead load and 75% live load, and 7/8in. diameter bolts are used.
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