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A 70 kg boy stands on the edge of a stationary 100 kg platform; the platform is on frictionless rollers. Suddenly he leaps with a velocity of 4 m/s from and parallel to the platform. Determine the velocity of the platform immediately after the leap.
a garden hose attached with a nozzle is used to fill a 10-gallon bucket. the inner diameter of the hose is 2 cm and it
a tank of 2m3 volume contains saturated ammonia at a temperature of 40c. innitially the tank contains 50 liquid and 50
find the free-fall velocity of an 8.5-in-diameter sphere bowling ball weighing 16 lbfalling through the following
a deep-water oil rig has just collapsed into the gulf of mexico. its blowout -preventer system has failed so thousands
The slotted wheel rolls to the right without slipping,
a two-stage air compressor operates at steady state compressing 10 m3min of air from 100kpa 300 k to 1200 kpa. an
Friction between the piston and cylinder wall can be neglected because the process occurs so slowly. For the air, determine the initial and final pressures in kPa and the boundary work for the process in kJ.
what is the sine wave generated by a phasor of length 9, rotating with an angular velocity of 325 rad/s; and with the phase angle of 0."
the velocity of a lift increases uniformly from zero to its maximum value at mid-height (1.4m) in 7.5s and then decreases uniformly to zero in 7.5s. The peak power output is 6kW when the velocity is maximum, determine the maximum lift force provid..
a packed bed is composed of crushed rock with a density of 175 lbmft3nbspof such anbspsize and shape that the average
the total pressure of air entering a single-stage centrifugal compressor is 1.013 bar and the total t is 288 k. the
a boiling-water-type nuclear fission reactor has shut down the backup pumps have failed and emergency cooling water
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