Answer:
A directory of relatives' phone numbers
Hope this helps
Explanation:
Answer: A. the rotational period of the earth is the same as that of the moon
Answer:
A (H)
Explanation:
The key uptop shows all the red are non metal and "H: is pink
After 2 half-lives there will be 25% (1/4th) of the original isotope, and 75% (3/4 th) of the decay product
<h3>What is Half life period ?</h3>
A half life is a measurement of the slope of an exponential decay function.
It is also defined as, the time it takes to halve the concentration of something in a process.
Each half life you will have half of what you had at the beginning of a given half life.
Learn more about half life here ;
brainly.com/question/9654500
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Answer:
the pressure would be 0.9 atmospheres
Explanation:
you just gotta add the presures for each of the gases that are added