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A two-stage gear reducer using identical pinion and gear sets for the high-speed and low-speed stages (similar to Figure P15.23) is to be used between a 10-hp, 2700-rpm motor and a 300-rpm load. The center distance is to be 8 in. The motor involves "light shock" and the driven machine "moderate shock." The shafts and their mountings correspond to ordinary good industrial practice, but not to "high-precision" industrial practice. Design the gears for a life of 107 cycles with 99% reliability and a safety factor of 1.2. Determine an appropriate combination of diametral pitch, face width, level of manufacturing precision, and material.
A shaft with a 2-inch outer diameter must deliver 5000 ft-lbs of torque. The shaft must be hollow and must simultaneously carry hydraulic fluid at an internal pressure of 30,000 psi. Assuming the shaft is closed-ended, and using the von Mises yield c..
a carnot heat pump refrigerator operates between -7 and 29 degree c. it has an input power of 3.5kw. determine a the
an acher shoots an arrow vertically upward. if the arrow ascends to a maximum height of 100 feeta find the value of
The cord is attached to the pin at C and passes over the two pulleys at A and D. The pulley at A is attached to the smooth collar that travels along the vertical rod. Determine the velocity and acceleration of the end of the cord at B if at the ins..
an internal crack has been detected by means of x-rays in the shell of a large cylindrical pressure vessel. the
Develop a flight simulation of this takeoff maneuver from initiation until takeoff, which is assumed to occur when the contact force of the aircraft with the ground N = 0. Develop a time response plot for the the airspeed. What is the distance tra..
Determine, the tensile stress in the component when first loaded, the temperature at which the stress will be zero if the component is rigidly held at its extended length.
Three kg of gas in a piston–cylinder assembly undergo a process during which the relationship between pressure and specific volume is py 0.5 5 constant. The process begins with p 1 5 250 kPa and V 1 5 1.5 m 3 and ends with p 2 5 100 kPa. Determine th..
An adiabatic piston cylinder contains 1 kg of R-134a. Initially the conditions inside the piston are 200 kPa and 0 degrees C. An electric heater inside the device runs with constant voltage of 110 V and a constant 0.1A of current for one hour.
calculate stoichiometric af ratiop of benzene c6h6. in an actual combustion of benzene the airfule ratio was 121.
determine diameter of a circular rod of ductile material with a fatigue strength ,e=280 Mpa. Add a tensile yield strength of 350 Mpa. The member is subjected to a varying axial load from 700 kN to -300kN. Assume Kt=1.8 and factor of safety=2.
a lake can freeze even if the temperature is above freezing. assuming a gentle breeze wind produces a convective heat
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