Determine the Schmidt number for benzene evaporating into air at 25ºC.
What will be an ideal response?
The Schmidt number, Sc, is the ratio of the kinematic viscosity to the mass diffusivity. The properties of vapor benzene are not listed in Appendix Table B-4 so, as a first approximation, assume benzene is a saturated liquid and from Appendix Table B-3 the viscosity and density are read. The mass diffusivity is read from Table 8-2 for benzene into air. Then, the Schmidt number is
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a. trapping of infrared radiation by the atmosphere. b. accentuated growth of plants near the equator, compared to other regions. c. capturing of visible and UV radiation from the Sun the atmosphere. d. shielding of life-forms from solar UV radiation by the ozone layer.
The Tully-Fisher relation uses the rotational speed of the galaxy to measure its ________
Fill in the blank(s) with correct word
Two light sources are said to be coherent if they are
A) of the same frequency. B) of the same frequency, and maintain a constant phase difference. C) of the same amplitude, and maintain a constant phase difference. D) of the same frequency and amplitude.
Suppose you have 1 kg each of iron, glass, and water, and all three samples are at 10°C. Rank the samples from lowest to highest temperature after 100 J of energy is added to each by heat. e
1.iron, glass, water 2.water, glass, iron 3.glass, iron, water 4.water, iron, glass 5.iron, water, glass