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When water discharges from a tank through an opening in its bottom, a vortex may form with a curved surface profile, as shown in Fig. P6.55 and Video V6.4. Assume that the velocity distribution in the vortex is the same as that for a free vortex. At the same time the water is being discharged from the tank at point A, it is desired to discharge a small quantity of water through the pipe B. As the discharge through A is increased, the strength of the vortex, as indicated by its circulation, is increased. Determine the maximum strength that the vortex can have in order that no air is sucked in at B. Express your answer in terms of the circulation. Assume that the fluid level in the tank at a large distance from the opening at A remains constant and viscous effects are negligible.
Calculate the declination, the zenith angle, and the azimuth angle of the sun for New York City (latitude 40.77°N) on October 1 at 2:00 p.m. solar time.
a solar-powered rankine cycle power plant uses 18.5 x 103 m2 of solar collectors. refrigerant-22 is used as the working
nitrogen n2 initially occupying 0.5 m3 at 1.0 bar 20 degree c undergoes an internally reversible compression during
an artificial membrane of thickness 0.1 mm separates two well-mixed fluids containing sucrose. the concentration of
The variable ANG takes two fuzzy states: positive large (PL) and negative large (NL). Their memberships are defined in the support set [-30°, 30°] and are trapezoidal. Specifically:
If the filling is done rapidly, calculate the final temperature in the small cylinder, (a) assume that oxygen is an ideal gas with Cv= 5R/2 and (b) using accurate thermodynamic data for oxygen.
r-134a is contained in a vertical cylinder fitted with a frictionless piston and a set of stops and the volume is
a compactor is a press that is employed to crush bulky material into a smaller volume. the system shown uses a
A 15-g magnet D is released from rest in the position shown, falls a distance of 320 mm, and becomes attached at A to the 200-g steel bar AB. Assuming that the impact is perfectly plastic, determine the angular velocity of the bar and the velocity..
For the special case in which M = 3m/2, find (i) the acceleration of the wedge, and (ii) the acceleration of the ball relative to the wedge.
A 90N force is applied to control rod AB as shown. Knowing the length of the rod is 225mm, determine the moment of the force about point B by resolving the force into components along AB and in direction perpendicular to AB?
An insulated, rigid tank is divided into two equal parts by a partition. Initially, one part contains 6.06 kmol of an ideal gas at 155 kPa and 30C, and the other side is evacuated. The partition is now removed, and the gas fills the entire tank. Dete..
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