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kvasek [131]
4 years ago
8

Why is the sky blue

Biology
1 answer:
Tresset [83]4 years ago
4 0

Answer: <em>Blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time. Closer to the horizon, the sky fades to a lighter blue or white. </em>

Explanation: Hope it help have a great day

:)

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Which MOST SPECIFIC classification puts humans in the same category as whales?
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Answer:

C)

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Explanation:

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The ballistic method of developing flexibility is the safest form of stretching. please select the best answer from the choices
Veseljchak [2.6K]

Answer;

The above statement is false.

The ballistic method of developing flexibility is not the safest form of stretching.

Explanation;

-Ballistic stretching uses the momentum of a moving body or a limb in an attempt to force it beyond its normal range of motion. It involves stretching by bouncing into (or out of) a stretched position, using the stretched muscles as a spring which pulls you out of the stretched position. An example is the ballistic method of touching your toes would be to bounce and move toward your feet.

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5 0
3 years ago
The elephant has 56 chromosomes in its body cells. when the elephant's body cells divide by mitosis, how many chromosomes will e
Dmitry_Shevchenko [17]
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3 0
3 years ago
Which of the following sources of electricity DOES NOT employ the use of turbines?
AleksandrR [38]
<h3>Answer:  A) Solar</h3>

=========================================================

Explanation:

The sources of wind, hydro, and fossil fuels all use a turbine. So we can rule out choices B,C, and D.

A turbine is basically a wheel that spins to generate motion energy into electrical energy. Think of it like one of those stationary bicycles and the bike powers up a nearby lamp (the faster you pedal, the brighter the bulb gets). Another example that's similar to a turbine would be those flashlights where you can rotate a crank to have the light come on (which is useful for when the batteries are completely dead). The windmill blades act as a giant turbine that the wind spins around. Hydroelectric turbines are spun by the falling water. Fossil fuels are burned to create very hot steam which then powers a turbine. Even nuclear power uses turbines as well. With fossil fuels and nuclear energy, the idea is to heat up a vat of water and then turn that intensely hot steam into electrical energy through a turbine.

With solar panels however, the electrical energy is converted through a process of sunlight interacting with the solar cells that <u>doesn't require a turbine</u>. This explains why you can use solar panels to power up devices such as phones or laptops without having any moving parts. All you need is  a flat set of solar panels.

There is a slight variation of solar power known as "concentrated solar power", aka "concentrated solar thermal", where solar panels are not used. Instead, a vast array of mirrors are set up to aim the suns rays at a very specific narrow area. Think of it like a magnifying glass to focus the suns rays. The place where the narrow beam hits has a very high temperature. This high temperature heats up water to turn to steam, and the process from here is effectively the same as fossil fuels or nuclear energy. So that means turbines are involved with concentrated solar power. I'm assuming your teacher is specifically referring to solar panels when they mentioned choice A.

3 0
3 years ago
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