The answer would be true because the moon has no atmosphere.
Only Earth does and is the only planet.
Hope I answered your question!
b) false
After two half-lives, there is no longer any of the original radioactive material remaining. Thus, the given statement is true.
A radioactive isotope's half-life is the amount of time it takes for the number of nuclei in a sample to decrease by half. The Phanerozoic eon refers to the whole period of geologic time that preceded the start of the Paleozoic era. The isotope's mass number is unaffected by the emission of a beta particle. There is no longer any of the original radioactive material after two half-lives.
A half-life, or the amount of time it takes for half of a substance to decay radioactively, is what distinguishes natural radioactive processes. It is simple to determine how much material remains after a specific number of half-lives. For instance, the six-hour half-life of the aforementioned technetium-99m indicates that starting at 100 percent, after six hours, we can no longer detect it.
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Answer:
true
After two half-lives, there is no longer any of the original radioactive material remaining.
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c. methosphere
b. exosphere
d. mesosphere
Answer:
The Answer is C. methosphere.
Explanation:
There is no methosphere in the layers of the atmosphere there is the Troposphere, next the stratosphere, then the mesosphere, the thermosphere/ionosphere, then lastly the exosphere.
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b. Panama’s sole control over the Panama Canal
c. Frances abandonment of the Panama Canal project
d. Joint control of the Panama Canal and Los Estados Unidos
The main factor attributed to Panama's booming economy is that Panama's sole control over the Panama Canal.
The canal links the Atlantic and Pacific Oceans, saving ships from having to travel around South America. A new set of locks allowing larger ships to passage through the canal were opened in 2016.
The panama canal was built to lower the distance, coast and time it look for ships to carry cargo between the Atlantic and the Pacific Oceans. Before the canal, ships would have to go around the entire continent of South America.
The correct answer is option B.
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