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Physics, 22.06.2019 12:50
Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.
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Arrange the images in order to show how lake-effect snow occurs.
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Physics, 22.06.2019 15:10
What does si stand for,when referring to a system of measurement
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Physics, 22.06.2019 20:00
What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?
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A star is observed to have a temperature of 3000 K and a luminosity of 105. What is the color of the...
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