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jeyben [28]
2 years ago
15

Help Please !!!

Physics
2 answers:
Deffense [45]2 years ago
6 0
1.
<span>The Galápagos Islands contain more different species than any comparable place on the earth.
2.</span>
<span>Their aim is to prevent extinctions.
3.</span>
<span>a gas that absorbs and re-releases heat radiated by the earth
4</span>
<span>acid rain
5.</span>
<span>stratospheric ozone
6</span>
<span>methane
7.</span>
landfill
8.
<span>catalytic converter</span>

Vlada [557]2 years ago
6 0

Answer:

Q1- The correct answer is: Many species unique to the islands may become extinct. Those species won't have another place like Galápagos to develop themselves, ceasing to exist then.

Q2- The correct answer is: Their aim is to prevent extinctions. By preventing it, diversity is protected in different places.

Q3- The correct answer is: a gas that absorbs and re-releases heat radiated by the earth. Those gases are very harmful for our atmosphere when in excessively high amounts, because they increase the greenhouse effect.

Q4- The correct answer is: acid rain. Sulfur can mix with water particles on air and be condensed into rain, lowering water's pH and making it acid.

Q5- The correct answer is: stratospheric ozone. It protects us from sun radiation and also transfers heat for us.

Q6- The correct answer is: greenhouse gases. Those absorb and re-release the heat in our planet, increasing global warming effects.

Q7- The correct answer is: enacting air pollution laws. The smog caused by it harmed thousands of people, and this aspect wasn't controled until then.

Q8- The correct answer is: water vapor. It dissipates heat, and doesn't absorb and re-release it.

Q9- The correct answer is: landfill. The other means of disposal aren't as common as landfill.

Q10- The correct answer is: catalytic converter. It transforms the gaseous emissions into other products by chemical reactions.

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2. A can filled with sand has a mass of 0.65kg is swung overhead in a horizontal circle of radius 0.70m at a constant rate of 2.
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<h3><u>Answer</u>;</h3>

≈ 5 Kgm²/sec

<h3><u>Explanation</u>;</h3>

Angular momentum is given by the formula

L = Iω, where I is the moment of inertia and ω is the angular speed.

I = mr², where m is the mass and r is the radius

 = 0.65 × 0.7²

 = 0.3185

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                              =  15.71

Therefore;

Angular momentum =  Iω

                                 = 0.3185 × 15.71

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