The percentage of water vapor present in the air compared to that required for saturation is the?
a. ?mixing ratio.
b. ?absolute humidity.
c. ?dew point.
d. ?relative humidity.
e. ?specific humidity.
ANSWER: d
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How can a hydrogen atom, which has only one electron, have so many spectral lines?
A. The protons in the nucleus are also giving off various light frequencies. B. One electron can be boosted to many different energy levels. C. The electron is able to move at various speeds. D. The atomic radius of the hydrogen atom is relatively large.
The bob at the end of a vertical spring vibrates up and down once every 2 s. Its frequency is
A. 2 Hz. B. more than 2 Hz. C. 0.5 Hz. D. none of the above
Besides deserts, where is the wind a significant geologic agent? What will be an ideal response?
Atmospheric jets are relatively narrow bands of high-velocity winds that flow from west to east at high altitudes.
Answer the following statement true (T) or false (F)