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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).
A raft of size 4 m × 4 m carries a uniform load of 200 kN/m 2 . Using the point load approximation with four equivalent point loads, measure the stress increment at a point in the
Q. What do you mean by Elastomeric bearings? Steel bearings are good but suffer from problems of corrosion and high level of maintenance. Due to these problems of steel bearing
Figures (a) and (b) respectively give details of a simply-supported bridge beam and its (idealised) cross-section. In addition to the dead load of 25 kN/m (including self weight),
how does wrong calculations in normal stress cause partial or total collapse of a building?
what is the cause of scale and sludge formation and its diadvantages
What is the actual mix propotion for M35/ C35 design mix concrete
Binder: Normally 60/70 penetration grade, and provides cohesion to the mixture and increases its stability. The mix design is done by the Marshall test, in which a specimen
Find out the joint distribution: Let X I and X 2 be two independent random variables each distributed uniformly in the interval [ 0, a ], where a > 0 is a constant. Find out
Actually, drying is not directly linked to hardness in concrete. After concrete is poured, putting it in a wet environment by spraying it constantly with water will hasten its hard
Define the Predominant factor in atmospheric corrosion? The predominant factor in atmospheric corrosion in areas located above splash zone is moisture as there is an excess ava
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