The graph shows the relationships between air vapor pressure, air temperature, a
ID: 237092 • Letter: T
Question
The graph shows the relationships between air vapor pressure, air temperature, and relative humidity. Relative humidity on the graph is abbreviated ‘hr’ and shown as a proportion, rather than a percentage; a proportion of 1.0 equals 100% relative humidity, a proportion of 0.5 equals 50%.
The average daily high air temperature during this time of year in Phoenix (early September) is about 40oC (103oF). The average daily high air temperature in January in Phoenix is about 19oC (66oF). Comparing these two times of year (September 40oC and January 19oC), the air during the warmest part of a typical day in September can hold ____ times as much water vapor as during the warmest part of a typical day in January.
about ½ (in June it can only hold one-half or 50% as much water vapor as in January)
about 1 (“1 times” means that they could hold the same amount of water vapor)
about 1½
about 2 (“2 times” means that it could hold twice as much)
over 3
a.about ½ (in June it can only hold one-half or 50% as much water vapor as in January)
b.about 1 (“1 times” means that they could hold the same amount of water vapor)
c.about 1½
d.about 2 (“2 times” means that it could hold twice as much)
e.over 3
Explanation / Answer
A) about 1 (“1 times” means that they could hold the same amount of water vapor)
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