A 100 kg drop hammer H is operated by a motor. It falls from a height of 9 m on thick nail N which is to be driven into the hard block. The hammer has to be lifted to height of 9 m in 12 s with constant velocity. If the efficiency of the motor is assumed to be 80%, the power required by the motor is approximately (in kW)
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Sedimentation analysis is used only for the soil fraction finer than 75 microns. Soil particles are allowed to settle from a suspension. The decreasing density of the suspension is measured at various time intervals.
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