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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).
Q. Explain Foundation design discharge for a bridge? To provide for an adequate margin of safety against any abnormal flood exceeding the design discharge (Q), the foundations,
what are the appropriate methods of concreting
For a system Q =W+ ΔE where ΔE is the change in E, the stored energy in the ΔE system. E has various forms 1. Kinetic Energy 2. Potential Energy Work do
The loading period for a building extended from Feb., 1957 to Feb., 1959. In Feb., 1962, the average measured settlement was found to be 117 mm. The ultimate settlement was expecte
1) A building constructed from steelwork requires the following sections to be designed: a. A beam carrying a characteristic permanent load of 11kN/m and a characteristic variable
The specific gravity of ferric chloride solution equals 1.3. How much does one gallon of ferric chloride weigh? Solution: ρ ferric chloride /ρ water = 1.3 Conver
Explain the Perception Reaction Time A significant variable in the successful processing and use of information is the speed with which this is done. Perception-Reaction Time (
distomat
what is the waste utilisation?
A retaining wall 9 m high retains cohesion less soil, with an angle of internal friction 33°. The surface is level with the top of the wall. The unit weight of the top 3 m of the f
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