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The sketch shows a common consumer product called Water Pik. This device uses a motor to drive a piston pump that produces a jet of water (diameter d = 3 mm, temperature T = 10 °C) with a speed of 25 m/s. Estimate the minimum electric power in watts that is required by the device. Hints: (a) Assume that the power is used only to produce the kinetic energy of the water in the jet; and (b) in a time interval ?t, the amount of mass that flows out the nozzle is ?m, and the corresponding amount of kinetic energy is (?mV2/2).
Schedule control is concerned with all of the following except: a. Influencing the factors which create schedule changes b. Determining that the schedule has changed c.
finite elements
Q. Kerb overflow weirs – horizontal bars vs. vertical bars? Overflow weirs must be provided for steep roads (longitudinal gradient>5%), flat roads (longitudinal gradient Ess
An I-section beam 350*200mm2 has a web thickness of 12.5mm & a flange thickness of 25mm. It carries a shearing force of 200KN at a section. Sketch the shear stress distribution acr
What is the Sludge Volume Index? Two 1 L samples of mixed liquor are taken from a lagoon. After settling for 30 min in a graduated cylinder, 250 mL of solids have settled out i
what is black cotton soil in dry condition
The 6 monthly payment application for the construction of a $70,000,000 University dormitory is analyzed and the summary accounting show: the budgeted cost of work performed is $14
Q. Disadvantages of excessive concrete covers? In reinforced concrete structures cover is generally provided to protect steel reinforcement from corrosion and to provide fire r
Ask What is the density of cement?
Statically indeterminate structures a. Fall into two categories: 1. Beam problems with additional supports/restraints 2. Axial bar members subjected to temperature/forc
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