What is the rock that has no exposure to chemical or mechanical weathering known as?

Answers

Answer 1
Answer: Tthis is known as the Goldich Dissolution Serie


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Which one is often used in magnets gold or cobalt?

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Cobalt is often used because it react to magnets while gold does not react to magnets.
It is cobalt because gold doesnt have an effect on magnet so it is the only logical explanation

Why would it be difficult to date an item that was only 12 years old using carbon dating?

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Because it is simply to young to use carbon dating, carbon dating is only used for things thousands to millions of years old.
Some people can get confused with carbon dating. Most people think it is used to show the age of a fossil or a rock. The rocks and fossils are called "inorganic matter" it is called that because it is not a living thing if it was a living thing then it would be called "organic matter". Carbon dating is usually only useful for organic matter that is less than 3-5,000 years old.I'm not sure if this helped but I hope you get the answer.

A sodium atom that has a mass number of 24

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Not sure what the question is, but a standard sodium atom has 11 protons, 11 electrons, and 12 neutrons with an atomic mass of 23. A sodium atom with a mass number of 24 probably has 13 neutrons.

If we know the total energy in a system is 30 j, and we know the PE is 20 j, what is the KE?

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30j-20j= 10j 

The kinetic energy is 10 joules

The total energy is equivalent to PE+KE. Therefore the answer is 10 joules.

Need help !!!!! In this question im stuck

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Decrease, increase and increase I think this is correct

Which type of fire is sometimes set as a way to protect a forest?

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Answer;

Surface fire

Explanation;

  • Surface fires are type of forest fires that may burn primarily as a surface fire, spreading along the ground as the surface litter and undergrowth on the forest floor and is engulfed by the spreading flames.
  • They are the easiest fires to put out and cause the least damage to the forest. Surface fires create the least amount of destruction.
  • These fires protects the forest by releasing the nutrients that would otherwise decompose slowly, having little benefit to the ecosystem.
  • Additionally, these fires allow more open spaces for new and different kinds of vegetation to grow and receive sunlight.