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Alika [10]
2 years ago
5

Why is gold so valuable? Is it found all over the world?

Biology
2 answers:
Juliette [100K]2 years ago
7 0

Answer:

"It turns out then, that the reason gold is precious is precisely that it is so chemically uninteresting. Gold's relative inertness means you can create an elaborate golden jaguar and be confident that 1,000 years later it can be found in a museum display case in central London, still in pristine condition."

Explanation:

miss Akunina [59]2 years ago
6 0

Answer:

hope it is use full to you

Explanation:

The metal is abundant enough to create coins but rare enough so that not everyone can produce them. Gold doesn't corrode, providing a sustainable store of value, and humans are physically and emotionally drawn to it. Societies and economies have placed value on gold, thus perpetuating its worth.

Gold has the highest corrosion resistance of all the metals and it is corroded only by a mixture of nitric and hydrocloric acid. Gold is a noble metal because it does not oxidize. The mentioned characteristics are enough to make a very useful and desired metal; thus, a very valuable one

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Answer:

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Explanation:

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2 years ago
A geologist is studying two different rhyolite flows to determine if they were erupted at the same time.
ss7ja [257]
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It can be calculated using the equation:

 (1/2)ⁿ = x

x - decimal amount remaining, 

n - a number of half-lives.


x = 50% = 50/100 = 0.5

n = ?

(1/2)ⁿ = 0.5

log((1/2)ⁿ) = log(0.5)

n * log(1/2) = log(0.5)

n * log(0.5) = log(0.5)

n = log(0.5)/log(0.5)

n = 1


Q10. The answer is 2.


It can be calculated using the equation:

 (1/2)ⁿ = x

x - decimal amount remaining, 

n - a number of half-lives.


Rhyolite #2 has 25% of the parent H remaining:

x = 25% = 25/100 = 0.25

n = ?

(1/2)ⁿ = 0.25

log((1/2)ⁿ) = log(0.25)

n * log(1/2) = log(0.25)

n * log(0.5) = log(0.25)

n = log(0.25)/log(0.5)

n = -0.602 / - 0.301

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Q3. The answer is 100 million years.


A number of half-lives (n) is a quotient of total time elapsed (t) and length of half-life (H):

n = t/H

n = 1

t = ?

H = 100 000 000 years


n = t/H

t = n * H

t = 1 * 100 000 000 years

t = 100 000 000 years<span>

</span>

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Answer:

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