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.
Air enters the compressor of a gas turbine at 100 kPa, 300 K, and a volumetric flow rate of 5.0 m3/s. The air is compressed in two stages to 1200 kPa, with intercooling to 300 K between the stages at a pressure of 350 kPa.
A cylinder having an initial volume of 3 m³ contains 0.1 kg of water at 40ºC. The water is then compressed in an isothermal quasi-equilibrium process until it has a quality of 50%.
The wet feed material to a continuous dryer contains 50 wt% water on a wet basis and is dried to 27 wt% by countercurrent air flow. The dried product leaves at the rate of 907.2kg/h.
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
A turbine takes in 2 kg/s neon at 27 degC and 200kPa with negligible velocity. The produced work is 75 kW and 30 kW of heat leaks into the turbine from the surroundings. The neon exits at 100 kPa and 230 K.
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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