The equation f=−vex(dm/dt) for the thrust on a rocket, can also be applied to an airplane propeller. in fact, there are two contributions to the thrust: one positive and one negative. the positive contribution comes from air pushed backward, away from the propeller (so dm/dt< 0), at a speed vex relative to the propeller. the negative contribution comes from this same quantity of air flowing into the front of the propeller (so dm/dt> 0) at speed v, equal to the speed of the airplane through the air.
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In a set amount of time, a battery supplies 25j of energy to an electric circuit that includes two different loads. one of the loads produces 10 j of heat energy during this time interval. how much heat energy is produced by the second load in this time? explain your answer
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Nitrogen (n2) undergoes an internally reversible process from 6 bar, 247°c during which pν1.2 = constant. the initial volume is 0.1 m3 and the work for the process is 121.14 kj. assuming ideal gas behavior, and neglecting kinetic and potential energy effects, determine heat transfer, in kj, and the entropy change, in kj/s. show the process on a t-s diagram.
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You can melt ice by applying pressure because the solid/liquid line has a slope.
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The equation f=−vex(dm/dt) for the thrust on a rocket, can also be applied to an airplane propeller....
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