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Suppose it is impossible to use an extensometer on the gauge section of a test specimen. Instead a butt-end specimen (Figure 3.2c) is used and the strain is computed from the cross-head movement. There are two possible sources of error in this procedure. One is that the gripping system may deform elastically and the other is that the butt end may be drawn partly through the collar. How would each of these errors affect the calculated true stress and true strain?
you are interested in determination of a steady state temperature profiles in a cylinder conducting the electrical
there is flow between two plates as shown in the schematic. the bottom plate is stationary. the top plate is moving at
A car engine burns 5 kg fuel (equivalent to addition of QH) at 1500 K and rejects energy to the radiator and the exhaust at an average temperature of 750 K. If the fuel provides 40 000 kJ/kg what is the maximum amount of work the engine can provid..
Moist air at 45?C and relative humidity 30% (State 1) with another stream of moist air at 20?C and relative humidity 50% (State 2) in an adiabatic duct. Mass flow rate of dry air is 0.8 kg/s at section 1 and 1 kg/s at section 2. The mixed stream (Sta..
a solid circular shaft and a tubular shaft both with the same outer radius of cc0 0.600 are being considered for a
Two bars, one having a circular section of radius b, the other an elliptic section with semiaxes a,b. For equal angles of twist, which bar experiences the larger shearing stress?
A manometer containing oil (r = 850 kg/m3) is attached to a tank filled with air. If the oil-level difference between the two columns is 60 cm and the atmospheric pressure is 98 kPa, determine the absolute pressure of the air in the tank.
the airplane on the amusement park ride moves along a path defined by the equation r4m angle0.2t rad and z0.5cosangle
A rigid tank of 1 m3 contains nitrogen gas at 600 kPa, 400 K. By mistake someone lets 0.5 kg flow out. If the final temperature is 375 K what is then the final pressure?
A spur gear has 48 teeth with a diametral pitch of 8 and a pressure angle of 20 deg. The face width is 0.75 inches. If the gear is transmitting 25 HP at 250 rpm
A 20-mm diameter rod made of a ductile material with a yield strength of 350 MPa is subjected to torque of 100 N.m and a bending moment of 150 N.m. An axial force is then gradually applied. Determine the value of force when the rod begins to yield..
neglecting the effects of radiation absorption emission and scattering within their atmospheres calculate the average
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