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Assume that for a tensile test, d?t/d?t= ?t when necking begins. Based on this condition, determine the true strain at the onset of necking? Explain carefully any assumptions made.
a car air conditioning system operates with r-134a in the peak summer outside at 100degf and inside desired at 77degf.
We learned that a room-full of gas is actually pretty heavy, and this can be used to our advantage. For example, if you want to measure something tall, you can measure the atmospheric pressure difference from its top to its base, and actually use tha..
a 12-in. length of aluminum tubing with properties of e 10.4 times 106 psi and alpha 12 times 10 -6 per degree
A cylindrical specimen of a metal alloy 51.3 mm long and 11.1 mm in diameter is stressed in tension. A true stress of 350 MPa causes the specimen to plastically elongate to a length of 57.9 mm. If it is known that the strain-hardening exponent for th..
a fountain produces a vertical jet of water which rises to a height of 30 m before falling back into a pond. if the jet
when the 35-kg cylinder is released from rest the spring is subjected to a tension of 75 n.a determine the speed of the
baseline validationdetermine the natural frequencies of the system-for the baseline systemdesign modificationnotice
some hypothetical metal has the simple cubic crystal structure i.e. atoms positioned at each of the eight corners with
it is found that 10 btus of heat must be supplied to a house in order to maintain its temperature at 70of when the
A polymeric material is being considered as a coating film to protect an optical storage disk from water vapor damage. Suppose we need to protect a disk surface from an ambient medium that will be at 45% relative humidity at 25° C. How thick must the..
a piston cylinder device initially contains 5kg of water at saturated liquid state1. it undergoes a process in which it
A fan that can provide air speeds up to 50 m/s is to be used in a low-speed wind tunnel with atmospheric air at 25°C. If one wishes to use the wind tunnel to study flat-plate boundary layer behaviour up to Reynolds numbers of Rex = 10^8 , what is the..
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