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A centrifugal pump with a 12-in.-diameter impeller requires a power input of 60 hp when the flowrate is 3200 gpm against a 60-ft head. The impeller is changed to one with a 10-in. diameter. Determine the expected flowrate, head, and input power if the pump speed remains the same.s
Question: (a) Polystyrene has a yield stress of 30 MPa. The material is subjected to a 20 MPa tensile load. Will the material behave elastically? (b) Explain what exactly is occurring during polymer creep.
find an expression for rate of heat loss as a function of the other three parameters in the problem. (b) If the temperature difference ? T doubles, by what factor does the rate of heat loss increase?
water is to be pumped from a dam to a storage tank 20 m above at a rate of 70 ls. the electric power needed to achieve
nitrogen at 100c and 600 kpa expands in such a way that it can be approximated by a polytropic process with n 1.2.
consider an air-water mixture of total pressure of 100 kpa and temperature of 20c and relative humidity of 59 that goes
A sheet of cold worked copper has a ductility of 15%. If the sheet thickness is 3.4 mm, what were the dimensions of the cross-section before rolling?
Tabulate the dimensional power function with a spreadsheet and then plot it. At what point is the maximum nondimensional power achieved?
Find the value of k ifonly 15% of the dynamic force is to be transmitted to the support or base. Also, find the clearance space to be provided to the compressor unit.
The restrained beam carries two loads of magnitude P. Denoting the ratio of the limit moment to the yield moment by K, determine the ratio PL/Pyp in terms of K. (Note: If the beam is elastic, the magnitude of the bending moment at each support is 2P..
Calculate the standard deviation of the unknown concentration and its 95% confidence interval assuming that each of the data in the table was obtained in a single experiment.
Problem: The crate on the platform weight 4 tons. What is the reaction at joint b?
a dishwasher circulates water at a rate of 55 gpm with a small pump. the total head ppg v22g leaving the pump is
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