A drop in pressure is an indication of
A) an approaching cold front.
B) orographic lifting.
C) adiabatic expansion.
D) a stationary front.
Answer: A
Physics & Space Science
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How many molecules are there in 14 grams of nitrogen gas?
a. NA/2 b. NA c. 2 NA d. The answer is not given.
Physics & Space Science
Compared to the orbits of Venus and Earth, the orbits of both Mercury and Mars have much ________ eccentricity
Fill in the blank(s) with correct word
Physics & Space Science
Each of two vectors, 
and 
, lies along a coordinate axis in the xy plane. Each vector has its tail at the origin, and the dot product of the two vectors is 
data-wiris-created="true" class="Wirisformula" />. Which possibility is correct? A.
and both lie along the positive x axis.B.
lies along the positive x axis. lies along the negative x axis.C.
and both lie along the positive y axis.D.
lies along the negative x axis. lies along the negative y axis.E.
lies along the positive y axis. lies along the negative x axis.
Physics & Space Science
The Phanerozoic eon is divided into three main
A) epochs B) periods C) eras D) ages
Physics & Space Science