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VLD [36.1K]
3 years ago
10

What are three scientific discoveries that have made health care what it is today?

Biology
1 answer:
aalyn [17]3 years ago
5 0
The MRI machine allowing us to see how the brain reacts to different stimuli is one.
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How would a geologist use absolute dating to determine the age of sedimentary layers? by dating the age of intrusions and extrus
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Answer:

Radiometric dating methods

Explanation:

Absolute dating is the process of determining an age on a chronological or specified time scale in which events occurred in archaeology and geology. Absolute dating can be determined by using properties of the atoms that make up materials.

The most common method of absolute dating uses by geologists is radiometric dating methods which is based on the natural radioactive decay of certain elements such as potassium and carbon found in the rocks. By comparing the ratio of parent isotope with a known half-life to daughter product in the rock, the age of the rock can be determined.

The carbon-14 isotope is used in radiocarbon dating, but is only useful for measuring recently formed rocks in the geologic past. The decay of Potassium-40 isotope known as potassium-argon (K-Ar) method allows dating of materials that up to 1,000 billion years old.

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How do mutations work in dna sequences? I'm so lost​
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