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jeka57 [31]
3 years ago
9

3. If a rock was determined to be around 3.9 billion years old how much Potassium 40 would be left in that rock sample?

Biology
1 answer:
son4ous [18]3 years ago
5 0

Answer:

What percent of potassium-40 remains undecayed in a rock that is 3.9 billion years old? The 3.9 billion year old rock has undergone three half-lives (3.9 divided by 1.3 = 3). After 3 half-lives, 12.5% of the potassium-40 remains undecayed.

]

Explanation:

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because the total time for restoration is lengthy, peat can be considered a fossil fuel. The correct option is B.

<h3>What exactly are fossil fuels?</h3>

Fossil fuels are fuels derived from the remains of dead plants and animals that decomposed over time under intense heat and pressure.

Because their replenishment time is longer than a human lifetime, fossil fuels are non-renewable energy sources.

Some examples of fossil fuels are petroleum, coal, etc.

The missing options of the question are:

  1. peat is a fossil fuel because rewetting it takes only 3-5 years.
  2. peat is a fossil fuel because the total time for restoration is lengthy.
  3. peat is not a fossil fuel because it has biologic origins, making it a biofuel.
  4. peat is not a fossil fuel because humans can promote the replenishment of peat.

The restoration process of peat takes a long time of more than 100 years. As a result, because the total time for restoration is lengthy, peat can be considered a fossil fuel.

Thus, the correct option is B.

For more details regarding fossil fuels, visit:

brainly.com/question/2029072

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2 years ago
Brian often interrupts his teacher while she is speaking and frequently forgets to complete his homework assignments. He also ha
Anton [14]

Answer:

Brian most clearly exhibits symptoms of ADHD

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This type of behviour affect the child in school and at home.

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What are some tips for handling a raccoon​
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four codon in mRNA sequence code for serine aminoacid.

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these four codons code for aminoacid serine.

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Is grasshopper separation of oxygenated/Deoxygenated blood yes or no
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no because Separation of oxygenated and deoxygenated blood in the heart of three types of animals. The three-chambered frog heart mixes oxygenated and deoxygenated blood in the ventricle. Therefore, the body never receives fully oxygen-rich blood.

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