A person describes his or her level of discomfort on a hot, muggy day as follows: "It's not so much the heat, it's the humidity." Explain the validity of this statement
A person may say this on a hot, muggy day because the main source of body cooling is through evaporation of perspiration. Since evaporation is a cooling process, when the air temperature is high and the relative humidity low, perspiration on the skin evaporates quickly and the air feels cooler. However, when air temperature and relative humidity are both high, body moisture does not readily evaporate, and less cooling of the body makes it feel warmer than it does at the same temperature with lower relative humidity.
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The breakup of Yugoslavia during the 1990s was caused by
A) ethnic cleansing. B) the assassination in Sarajevo of the heir to the throne of Austria-Hungary. C) rivalries among ethnicities. D) NATO. E) espionage by Russian agents.
In West Africa, French is a language that is used throughout a wide area for commercial or political purposes by people with different native tongues. French is an example of a(n):
A) culture hearth B) ethnic language C) universalizing language D) lingua franca
In toxicology studies, LD50 can be best described as the dose ________
A) at which 50% of an exposed population develops disease B) at which 50% of an exposed population develops a chronic effect from the toxicant C) in which at least 50% of the exposed population is not affected by the toxicant D) at which 50% of an exposed population is killed or displays a specific symptom E) in which more than 50% of the population dies as a result of the toxicant development
The chinook wind has been known to cause rapid increases in temperature in the Denver, CO area
Indicate whether the statement is true or false