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Figure P9.29 shows a Geneva indexing mechanism used, for example, on the indexing heads of machine tools. Each time the driving arm makes one revolution, the Geneva wheel (for the four-slot design illustrated) turns 90°. The arm supports a rolling cylindrical hardened-steel pin that fits into the Geneva wheel slots. The pin is to have the same length and diameter. The wheel is made of heat-treated alloy cast iron (E = 140 GPa, v = 0.25). For a design contact stress of 700 MPa, determine the smallest acceptable pin diameter if the design overload torque (normal torque times safety factor) applied to the arm is 60 N m.
Determine the velocity c2 and the change in entropy per unit
Determine the radial acceleration of a point on the outer surface of the 36 inch diameter tires of a jet powered car traveling at 660mph.
A mixture of carbon monoxide and oxygen is to be prepared in the proportion of 7 kg to 4 kg in a vessel of 0.3 ml capacity. If the temperature of the mixture is 15°C. determine the pressure to which the vessel is subject. if the temperature is rai..
air is considered as an ideal gas. dont use gas table for gas properties just assume that both cv and cp are constants.
What instrument ratings (or specifications) would you consider crucial in this application? Discuss their significance.
Define the first order differential equations using the state variables - define a state variable model for the system in a matrix notation.
in an overhead smash a tennis player strikes the ball with the center of the head of the racquet. say the contact
We are learning about oscillations and second-order dynamic systems. We observe a crane at a construction site on campus and notice that as soon as the crane operator releases the load, the whole crane oscillates back and forth several times as the v..
an ideal gas undergoes a two-step process. beginning at state 1 it is pressurized at constant volume to state 2. then
steam enters a turbine at 300 deg c and exhausts at 20 kpa. it is estimated that the isentropic efficiency of the
The conditions in an office in summer are 75 F DB and 50% RH. Should the conditions remain as they are or should they be changed? Explain. What changes should be made, if any? Explain.
find the transfer function for the following impulse responsefind the transfer function for the following impulse
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