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laiz [17]
4 years ago
14

Blank is a dark colored rock with a relatively low silica content

Biology
1 answer:
kirza4 [7]4 years ago
4 0
Basalt is a dark colored rock with a relatively low silica content.
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Gas makes things buoyant, why ? And what are ways that this could be useful?
ryzh [129]

Answer:

Gas makes things buoyant by making the volume of an object lighter than the surrounding fluid it is trying to displace.

Gas Buoyancy is useful in the following ways;

• Airships

• Steel ships and

• All floating and flying vessels

Explanation:

Buoyancy is the tendency of an object to float in a fluid such as air or water. It is a phenomenon that was theorized by the mathematician, Archimedes known as the Archimedes Principle.

It states that the upward buoyant force that is exerted on a body immersed in a fluid is equal to the weight of the fluid that the body displaces.

The principle explains the reason why objects float and fly.

So, when an object is immersed in a fluid, it can float due to the upward force exerted by the fluid on the object. But for this to happen, the object has to weigh less than the fluid it is displacing.

This is where the use of a gas comes into play.

Because the object may be heavier than the surrounding fluid it is trying to displace, it is filled with a large amount of gas (usually hydrogen and/or helium) which is lighter. This makes the volume of the gas and the object put together lighter than that of the surrounding air.

This is what causes objects to float or fly

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3 years ago
If you cry a lot, would you eventually go blind?
Maslowich

Answer:

No, you would not go blind, even though the composition of emotional tears are different.

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3 years ago
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Describe the differences between the forces of magnetism and gravity.
lord [1]

Answer:

Gravity is not the same thing as magnetism. They are in fact entirely distinct forces. Gravity is a force that works with weight between two objects. Magnetism can pull or separate the two objects, depending on how the magnets point.

Explanation:

3 0
3 years ago
One method of lessening the environmental impact of strip mining is to -
Lubov Fominskaja [6]
One method of lessening the environmental impact of strip mining is by replacing landscaping after mining. This will help to seal off the bare land to avoid accidents. It also prevents soil erosion of the lose soil due to mining. Landscaping will modify the features of the land and make it beautiful and environment friendly 
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Ok so if I don't answer this question right imma get a beating soooo help a brotha out
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Answer:Short

Explanation:Also I feel so bad for you.

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3 years ago
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