Answer:
D.) the density changed
Explanation:
This would be the answer because it is a specific amount of Nitrogen undergoing a physical change. Since the color and boiling point don't influence a change in volume, those are ruled out. Also, nitrogen's molecular mass never changes, so that would not make sense either. But if the density, which is mass/volume, has changed (more specifically decreases) then it means the volume has increased.
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Answer: (The composition of a bituminous coal by percentage is roughly: carbon [C], 75–90; hydrogen [H], 4.5–5.5; nitrogen [N], 1–1.5; sulfur [S], 1–2; oxygen[O], 5–20; ash, 2–10; and moisture, 1–10.)
North Carolina winter weather evolves from complex meteorological patterns that are difficult to forecast, and which lead to considerable variability in weather conditions across the state. As a result, the frequency and intensity of winter weather events are highly variable and dependent upon large (synoptic) and small (mesoscale) scale atmospheric patterns.
The jet stream is a narrow band of strong winds in the upper atmosphere. In winter, it separates cold, Arctic air masses from warmer, continental air masses. Certain regions of the jet are also favorable for storm development, while others are not.<span>The orientation and location of the jet stream has large implications on the weather year-round, but even more so in winter because the jet stream is stronger due to a large temperature contrast from the north to south.
i know nothing about science but then it just comes to me and i get it right.
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