This image shows the velocity of gas moving toward or away from us on the Sun's surface, as measured through Doppler shifts; the key indicates the measured velocity, with negative velocities indicating gas moving toward us and positive velocities away from us. What do the small-scale changes in the shading represent in this map?
A) vibrations of gas moving up or down at the solar surface
B) variations in the altitude of the solar surface
C) variations in the temperature of the photosphere
D) Nothing; this is an artist's rendering of the sun.
A) vibrations of gas moving up or down at the solar surface
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Water-90% triethylene glycol is to be used to dry air. If the mixture is added to an air stream at 25ºC, determine the amount of mixture required per kilogram of dry air to dehumidify the air if the air stream is at 35ºC and 90% relative humidity. Assume that 25% excess mixture is required than theoretically predicted. Also determine the outlet air temperature and the relative humidity. Assume that the specific heat of triethylene glycol is 2.4 kJ/kg?K.
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The earth has radius R. A satellite of mass 100 kg is in orbit at an altitude of 3R above the earth's surface. What is the satellite's weight at the altitude of its orbit?
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