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Bumek [7]
3 years ago
10

which statement correctly describes how the amount of ofoxygen in the earth’s atmosphere has changed over time?

Biology
1 answer:
Kay [80]3 years ago
3 0

Answer:

Based on the relative volumes of the gases in Earth’s atmosphere, nitrogen is actually more than 3 times more than oxygen. Because the troposphere is the lowest atmosphere layer, it contains 75 percent of the atmosphere’s mass.. From largest to smallest, Earth’s atmosphere composition contains nitrogen, oxygen, argon, CO 2 and trace gases.

Explanation:

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Answer:

The correct answer to the question is Biofuel

Explanation:

Biofuel can be used as an alternative energy technology source to power a car.

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The biofuels that can be used are butanol,ethanol and biodiesel etc.

Wind, geothermal and hydropower can not be directly used to provide power to the car.

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cellular level of organization

Explanation:

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creativ13 [48]

Answer:

unidirectional is ur answer mate

hope it helps u

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3 years ago
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An engineer is building a new steel skyscraper in a area with a lot of Earthquakes, Compare two systems (fixed based system and
Leokris [45]

Answer:

<h2><em><u>Base</u></em><em><u> </u></em><em><u>isolated</u></em><em><u> </u></em><em><u>system</u></em></h2>

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<u>Fixed based system:- </u>

A fixed-base building (built directly on the ground) will move with an earthquake’s motion and can sustain extensive damage as a result. 

<u>Base isolated system:-</u>

A base isolation system is a method of seismic protection where the structure (superstructure) is separated from the base (foundation or substructure).

<em><u>Hence</u></em><em><u>,</u></em>

<em><u>A</u></em><em><u> </u></em><em><u>base</u></em><em><u> </u></em><em><u>isolated</u></em><em><u> </u></em><em><u>system</u></em><em><u> </u></em><em><u>is</u></em><em><u> </u></em><em><u>much</u></em><em><u> </u></em><em><u>more</u></em><em><u> </u></em><em><u>better</u></em><em><u> </u></em><em><u>in</u></em><em><u> </u></em><em><u>a</u></em><em><u> </u></em><em><u>area</u></em><em><u> </u></em><em><u>where</u></em><em><u> </u></em><em><u>there</u></em><em><u> </u></em><em><u>are</u></em><em><u> </u></em><em><u>a</u></em><em><u> </u></em><em><u>lot</u></em><em><u> </u></em><em><u>of</u></em><em><u> </u></em><em><u>earthquakes</u></em><em><u>.</u></em><em><u> </u></em>

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Answer:

a is DA answer

Explanation:

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