This is tricky because it depends what you're holding constant, i.e., what you mean by "column of air"
When air cools, it becomes denser because it compresses - this assumes no change in mass (or amount) of air. If you're talking about a discrete column of air that does not change in mass, then cooling it would cause to to compress and become denser because the volume is less (density = mass/volume). The pressure would remain the same because there is the same amount of air.
If you want to change the amount of air in the column as fluid dynamics would demand, then you'd be holding volume constant. So the column would cool, compress, and more air would move in to fill the spot left by its compression. So the column would increase in mass as well as density and pressure.
density stratification
A comet becomes brighter as it approaches the sun. It's at that time that the heat from the sun begins to boil the ice present in the comet, and its tail becomes visible as it moves, leaving a trail behind it that scatters light, making it appear brighter.
If Fe becomes Fe^2+ it has lost 2 electrons, and so the Fe has been OXIDIZED.
ever since I became hypertensive, I found myself experiencing the same thing. Sometimes it also happens when I sneeze hard. But I've noticed some improvement with physical exercise. I believe it's got to do something with the blood pressure.
Dr. Harsh Vardhan is an Indian scientist who became a member of parliament and has served as the Minister for Science and Technology, Minister of Health and Family Welfare, and Minister of Earth Sciences in the Indian government.
India became part of the British Empire in the 1890's, and subsequently, Queen Victoria became Empress of India.
Became
It became a blastocyst
It became a blastocyst
She becomes one in Breaking Dawn
The answer is a towel. The wetter it becomes the dryer you are.
midgit
No, all gases are lighter than solids
life becomes dumb when we choose to stop learning, and thus life becomes uninteresting and...dumb.
He bred pigs. he became an MP and subsequently served as Home Secretary and then Prime Minister in the UK government
Fredrick Douglas was an African-American writer, orator and statesman. He escaped from slavery in 1838 at the age of 20 years and subsequently became a leader of abolitionist movement.
Become is the base verb.Becomes is the third person singular form of become. Use becomes with he/she/it or a singular noun subject egHe becomes violent when I talk to him.The dog becomes angry if you touch him. - singular noun subject = dogBecame is the past tense of become.He became annoyed when I talked to him