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The two-stage gear reducer in Figure P15.23 uses two identical pairs of gears. Compare the relative strengths of the gears for serving in the high-speed and lows peed positions, assuming 107 -cycle life for the high-speed gear. Consider both bending fatigue and surface durability.
Obtain the equation representing the displacement of the mass at time t > 0 when M = 50 kg, B = 180 N s m-1 and
an insulated piston-cylinder device contains 5 l of saturated liquid water at a constant pressure of 150 kpa. an
a car starts from rest with an acceleration of 1300 mih2 which remains constant until its velocity reaches 65 mph.
We produce a continuous unidirectionally reinforced composite containing 60 vol% HM carbon fibers in an epoxy matrix. The epoxy has a tensile strength of 15,000 psi. What fraction of the applied force is carried by the fibers?
a small pump is driven by a 2 kw motor with liquid water at 150 kpa 10degc entering. find the maximum water flow rate
What factors generally govern (a) the electrical time constant and (b) the mechanical time constant of a motor? Compare the typical values for these parameters and discuss how they affect the motor response.
An air bubble with a radius of 0.5 cm is released from the regulator of a scuba diver swimming 30 m below the sea surface. Estimate the radius of the bubble just before it reaches the water surface. Assume that the pressure inside the bubble is equal..
Provide your opinion as to which OSHA voluntary cooperative program would be the most beneficial to a small business that prints business cards and letterhead.
1. analyze the probable cause of the following problems in motors and suggest remedial measuresa. a
1-An x-ray diffractometer recorder chart for an element that has either the BCC or the FCC crystal structure shows diffraction peaks at the following 2θ angles: 400, 580, 730, 86.80, 100.40, and 114.70. The wavelength of the incoming x-ray used was 0..
blocks d and f weigh 50 lb each and block e weighs 80 lb. determine the length s for equilibrium. neglect the size of
Determine the stage pressure rise and stage efficiency when the degree of reaction is 50% and drag to left coefficient 0.08 - Determine the compressor overall efficiency assuming constant work is done in each stage.
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