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 distance between the objective and eyepiece is 14.0 cm. If a blood cell subtends an angle of 2.1 x 10-5 rad when viewed with the naked eye at a near point of 24.0 cm, what angle (magnitude only) does it subtend when viewed through the microscop
A nonreflective coating (n = 1.24) covers the glass (n = 1.52) of a camera lens. Assuming that the coating prevents reflection of yellow-green light (wavelength in vacuum = 563 nm), determine the minimum nonzero thickness that the coating can have
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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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