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Mandarinka [93]
3 years ago
6

The shortest day of the year in the northern hemisphere is

Biology
2 answers:
Svet_ta [14]3 years ago
6 0

Answer:

December 22nd

Explanation:

Viefleur [7K]3 years ago
3 0
A) December 22. Hope I helped :)
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The half — life of nickel is 96 years. How much of a 30-gram sample is left after 270 years?
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The amount of the 30 gram-sample that will remain after 270 years is 6.61 grams

<h3>How to determine the number of half-lives </h3>

We'll begin by obtaining the number of half lives that has elapsed. This can be obtained as follow:

  • Half-life (t½) = 96 years
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n = t / t½

n = 270 / 99

n = 2.8125

<h3>How to determine the amount remaining </h3>
  • Original amount (N₀) = 30 grams
  • Number of half-lives (n) = 2.8125
  • Amount remaining (N) =?

The amount remaing can be obtained as follow:

N = N₀ / 2^n

N = 30 / 2^2.8125

N = 6.61 grams

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1 year ago
Why are the size of our muscles partly an acquired trait and partly dependent on DNA?
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Actually, it is both acquired and part of your DNA. There is a logical <span>explanation but you have to figure that out on your own.</span>
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True or False?<br> The eastern United States has three types of plate boundaries offshore.
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Answer:

True

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divergent, convergent, transform

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Antibiotic resistance occurs when bacteria change in response to the use of these medicines. Bacteria, not humans or animals, become antibiotic-resistant. These bacteria may infect humans and animals, and the infections they cause are harder to treat than those caused by non-resistant bacteria

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