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A creek runs through a certain part of a campus where the water is falling about 2.5 mover a distance of just 8 m, and the creek before and after the fall is about 3 m wide. The sustainability club has asked you about the potential of harnessing this energy. It is difficult to measure exactly, but a rough estimate of the flow at this spot is 150 L/min. Determine the wattage that could be generated assuming an overall system efficiency of 60 percent. Sketch the arrangement that would permit this.
water behind a dam enters an intake pipe at a pressure of 1.05 bar and velocity of 1 ms flow through a hydraulic
Determine the minimum effective coefficient of friction at the rear wheels to prevent slipping. The mass of the loaded truck with mass center at G is 1900 kg.
Determine the minimum coefficient of static friction between the crate and the truck so that the crate does not slide relative to the truck.
geothermal steam is planned as an energy source for power generation. the steam enters and adiabatic exchanger at 2
The system rotates freely about the vertical spindle BE. After a period of slippage, disk D rolls without slipping. Knowing that the magnitude of the final angular velocity of disk D is 176 rpm, determine the final angular velocities of bar BC and..
Niobium forms a substitution solid solution with vanadium. Compute the number of niobium atoms per cubic centimetre for a niobium–vanadium alloy that contains 27 wt% Nb and 73 wt% V. The densities of pure niobium and vanadium are 8.57 and 6.10 g/cm3,..
Air enters the evaporator section of an air-conditioner at 100 kPa, 27 C with a volumetric flow rate of 6 m^3 /min. R-134a enters the evaporator at 120 kPa with a quality of 0.3 and rate of 2 kg/min and it leaves as a saturated vapor at the same pres..
Determine the increase in internal energy of 2 kg of argon if its temperature increases from 30C to 130C
Air enters the turbine of a gas turbine at 1200 kPa and 1200 K, and expands to two stages. Between the stages, the air is reheated at a constant pressure of 350 kPa to 1200 K. The expansion through each turbine stage is isentropic.
Compare the location of the metacenter with the center of gravity to evaluate stability.
A sample of refuse has a moisture content of 20%. A 1.2 g sample is placed in a calorimeter, and a gross calorific value of 6200 Btu/lb is measured based on the temperature rise. Further analysis shows that 0.3 g of ash remains in the bomb calorim..
a hollow-fiber dialysis unit is one design that provides a large surface area between blood and dialysate to permit
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