Speed of the identical spaceships
You and Maria each own identical spaceships. As you fly past Maria, you measure her ship to be 96 m long and your own ship to be 100 m long. How long does Maria measure your ship to be? How fast is Maria moving relative to you?
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Moist air with dry and wet bulb temperatures of 295K and 282K respectively enters a steam-spray humidifyer at rate of 90 kg of dry air/min. Saturated water vapor at 383K is injected at 52 kg/min.
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The starting current in a dc motor is 20 A but it normally operates on 110 volts with a back emf of 90 volts. What is the resonance in the windings? What is te current at normal load?
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