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A hollow steel shaft (G = 77.2 GPa, allowable stress = 50 MPa, outer diameter = 60 mm, inner diameter = 25 mm, Length = 5 m) rotates at 240 rpm. Determine (a) the maximum power that can be transmitted, and (b) the corresponding angle of twist of the shaft.
a 115-v shunt motor develops 21 ib-ft when the armature current is 12 a. as the load on the motor is increased the
why do materials that have the same composition and crystal structures have the same modulus of elasticity e
a bar of high strength aluminum alloy is 150 mm long and has a circular cross section of diameter 40mm. it is subjected
a motorcycle starts from rest at t 0 and travels along a straight road with a constant acceleration of 5 fts2 until it
2kg of air in a closed rigid tank is fitted with an electrical resistor. the resistor draws a constant current of 10
hydrogen at 25 bar 450degc enters an adiabatic turbine and expands to 2 bar 160degc with a mass flow rate of 0.2 kgs.
steam enters a well-insulated turbine operating at steady state at p14mpa t1320c and a velocity v110ms. the steam
a heat pump heats a house in the winter and then reverses to cool it in the summer. the interior temperature should be
Water enters a 2 meter diameter pipe at a temperature of 23 deg C. The water leaves the pipe at a temperature of 97 deg C The laminar flow rate is such that the Reynolds number is 800. What is the mass flow rate?
an office is occupied by 30 persons who each produce 200 btuh 58w of sensible heat and 0.25 lbh 0.1kgh of moisture. the
find: a) the pitch diameter of the pinion. b) the pitch diameter of the gear. c) the output torque of the gear. d) the minimum length of the key used to attach the gear?
when deciding what propulsion system is most appropriate for a mission thrust and isp are not the only parameters that
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