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The rotor with the steel gears shown in Fig. 10.34 was dynamically balanced in a balancing machine by the addition of the clay masses shown on the periphery of the gears. However, the balancing is to be achieved by drilling holes in the webs of the gears at the diameters shown. Determine the size and location of the holes for dynamic balance.
a 3 ft. diameter cylindrical block with specific weight 50 lbft3 is supported by a spring whose force is given by
A reinforced earth retaining wall (Figure 13.27) is to be 10-m-high. Here, Backfill: unit weight, g1 5 16 kN/m3 and soil friction angle, f19 5 348 Reinforcement: vertical spacing, SV 5 1 m; horizontal spacing, SH 5 1.25 m;
1 kg of propane is contained in a piston - cylinder assembly at a constant pressure of .20 mpa heat transfer slowly to
a thin-flat plate having a length of l 10 cm is heated by a constant-heat flux from the bottom and cooled by an air
a 4m3 storage tank containing 2m3 of liquid is about to be pressurized with air from a large high-pressure reservoir
a rigid chamber contains 100 kg of water at 500 kpa 100 c. a paddle wheel stirs the water at 1000 rpm with a torque of
determine the maximum allowable uniform load w that can be supported by the fiberglass beam if b 125 mm and the
The electronic components of a computer are cooled by air flowing through a fan mounted at the inlet of the electronic enclosure. At steady state, air enters at 18oC, 1 atm. For noise control, the velocity of the entering air cannot exceed 0.9 m/s. F..
a stone is released from an elevator moving up at a speed of 12 fts and reaches the bottom of the shaft in 2.5 s. a how
A simple undamped spring-mass system is set into motion from rest by giving it an initial velocity of 100 mm/s. It oscillates with a maximum amplitude of 10 mm. What is its natural frequency?
a projectile is launched horizontally with an initial velocity of 25.8 ms and lands on a slope that inclined at 28
Several of the new city council members "are up in arms" over the new annual fee and cost structure. However, they do not want to build more fire station capacity or own a lader truck that will be used an average of only 20 times a year.
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