Physics, 08.11.2019 01:31 YoEsMyles3115
Steam flows steadily through an adiabatic turbine. the inlet conditions of the steam are 4 mpa, 500°c, and 80 m/s, and the exit conditions are 30 kpa, 92 percent quality, and 50 m/s. the mass flow rate of the steam is 12 kg/s. determine (a) the change in kinetic energy, (b) the power output, and (c) the turbine inlet area.
Answers: 2
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The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage
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Physics, 22.06.2019 03:00
Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?
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Physics, 22.06.2019 11:20
The ultracentrifuge is an important tool for separating and analyzing proteins. because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite side. any difference in the masses of opposing samples creates a net force on the shaft of the rotor, potentially leading to a catastrophic failure of the apparatus. suppose a scientist makes a slight error in sample preparation and one sample has a mass 10 mg larger than the opposing sample. if the samples are 12 cm from the axis of the rotor and the ultracentrifuge spins at 70,000 rpm, what is the magnitude of the net force on the rotor due to the unbalanced samples? ( be thorough on your answer)
Answers: 3
Steam flows steadily through an adiabatic turbine. the inlet conditions of the steam are 4 mpa, 500°...
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