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1. Water vapor evaporating from a pond does so as if it were diffusing across an air film 0.15 centimeters thick. The diffusion coefficient of water vapor in 20 degrees C air is about 0.25 cm2/sec. If the air out of the film is fifty percent saturated with water vapor, how fast will the water level drop in a day? Data: the saturation partial pressure for water vapor at 20 degrees C is 23.4 millibar (1 atm = 1.0325 bar). The molecular weight of water is 18 g/mol. Hint: assume the mixture of air and water vapor obeys the ideal gas law. 2. Diaphragm cells are frequently calibrated by allowing 1 molar potassium chloride to diffuse into pure water. Your cell has compartment volumes of (upper) 42.3 cm3 and (lower) 40.8 cm3; the diaphragm is a glass frit 2.51 cm in diameter and 0.16 cm thick. In one calibration experiment, the concentration difference at 36 hours 6 minutes is 49.2% of that originally present.Estimate the diffusion coefficient? What is the cell's calibration constant?Assume H, the membrane partition coefficient=1.3. Consider the diffusion of dopant element A into crystalline wafer. The dopant rich coating is considered as a large source of A relevant to the amount of A diffused, so that the surface concentration CAs can be considered a constant. Determine the depth (z) of the front of diffusing dopant after two hours of diffusion. Assume that the front concentration is 2% of the surface concentration. Diffusivity of A= 6.5 X 10-13 cm2/s.
What are the specific crimes that are reported as the "Part 1" crimes and what is the criteria used for a crime to be included in the UCR.
How can "formative research" help the health advocate select and use a theory to strategize a communication campaign for health promotion?
Patricia Duong, having recently obtained her MBA, has been hired by one of the last of the large investment banking firms. As part of her responsibilities, she is required to make recommendations on investing in securities of foreign companies.
Sometimes the quickest and easiest way to restore a stream is simply to reconstruct it with heavy equipment. You might even create something more interesting and useful (at least from a human perspective) than the original.
A discussion on the nature of sexual equality and discrimination regarding social movements and the politics of difference. What is the politics of difference and what does it demand of social relations and political institutions.
Sensory memory is a general term that is used to refer to sensory buffers that can retain a large amount of memory, but only for a short period of time.
Can someone help me review theories and research in the Social Psychology regarding society attitude toward the foster care system and explain how the opinion can be changed.
Standard Oil Company of California (Socal) found oil in Saudi Arabia and the following year it joined with Texaco to form Casoc- renamed Aramco in 1948- 3 joint ty owned subsidiary staffed by American managers and formed to drill for oil in Saudi Ara..
how can one determine if there is a business necessity?
Write down the implications for treatment from the following cultural influences: A 1st generation 50 year old greek american female is looking treatment as her husband is verbally abusive.
How did the US gov nationalize civil rights and civil liberties? Explain how this power moved from being at the discretion of state governments to the discretion of national government?
"One of the firm's lawyers has asked you to conduct research on behalf of a client. The client is the victim of a sexual assault and did not report the event to the police. The client wants to know if she can sue the offender, and if so, for what can..
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