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rodikova [14]
3 years ago
7

Which characteristic is not used to categorize different types of landforms?

Chemistry
1 answer:
Oduvanchick [21]3 years ago
8 0
It seems that you have not added the necessary options for us to answer this question so I had to look for it. But anyway, here is the answer. The characteristic that is NOT used <span>to categorize different types of landforms is this: a natural physical feature of the Earth's surface. Hope this answer helps.</span>
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The carbon−14 decay rate of a sample obtained from a young tree is 0.266 disintegration per second per gram of the sample. Anoth
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Answer:

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Explanation:

1) <u>Carbon-14 disintegration rate of a young (alive) tree</u>: 0.266 per second per gram.

2)<u> Carbon-14 disintegration rate of a wood sample prepeared from an object recovered at an archaelogical excavation (dead matter):</u> 0.178 per second per gram.

3) <u>Ratio of decay</u>: A/A₀ = 0.178 / 0.266 = 0.669

4) <u>Half-life equation</u>: A/A₀ = (1/2)ⁿ, where n is the number of half-lives since the object died.

5) <u>Substitute and solve for n</u>:

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nlog(1/2)=log(0.669)\\ \\n=\frac{log(0.669)}{log(1/2)}\\ \\n=0.578

That means that 0.578 half-life has elapsed since the wood with which the object was created was dead matter.

6) <u>Convert number of half-lives to years</u>:

  • 0.578 half-life × 5715 years/half-life = 3,303 years = 3.30 × 10³ years.
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