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SpyIntel [72]
3 years ago
13

You analyze the ratio of radioisotope carbon 14, or ¹⁴C, in these fossil bones. ¹⁴C has a half-life of about 5,000 years. You ca

lculate that these fossil bones have about 12.5% of their original amount of ¹⁴C left. Based on this, you calculate that the fossil bones _______ and thus the age of this human habitation site ________ are around.
Geography
1 answer:
slega [8]3 years ago
5 0

Answer:

15003.19

Explanation:

The fossil bones age can calculated by using the formula

t = (In ( 12.5 /100) / (-λ)) × half life

where λ = 0.693

t = ((In (12.5 /100) / (-0.693) ) × 5000 = 15003.19 years

the age of the fossil bones is 15003.19

thus the age of the human habitation site 15003.19

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true

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Does Pakistan produce quality cotton? Which few factors support the growth of cotton in our country?
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Cave swallows make nests out of saliva, which some people harvest to make soup. If too many nests are harvested the swallows wil
Allisa [31]

Answer:

The correct answer is "3. Maximum sustainable yield"

Explanation:

Examining all the options,

The cost of bird nest soup cannot help people determine how many nests to harvest. By either increasing or decreasing the price, there is no direct or indirect effect on the peoples' ability to harvest the birds' nests.

International policies are those policies a nation sets up in order to protect their interest in the <em>international field. </em>The issue of nests harvesting might sometimes be a national issue. You cannot set up an international policy that would affect issues that occur nationally(within the auspices of the nation).

Maximum sustainable yield is the largest yield that can be taken out of a certain resource within a period of time. This concept can help people determine the number of nests to harvest because it tells them to stop when a particular number of nests have been harvested within a set time period.

The tragedy of the commons is a situation where shared-resources are over-consumed, spoiled and depleted by those who put their own self interest ahead of the interest of others. It cannot help the people to determine how many nests to harvest because if certain individuals are self-centered and ultimately greedy, they would go the extra mile to achieve their goal without considering the consequence of the birds extinction.

Fundamental niche of the cave swallow are the conditions it requires to survive and reproduce itself. However, there is an absence in the interaction with other species. This means that other species are not taken into account. This concept cannot help people determine how many nests to harvest, rather, <em>realized niche </em>may help.

8 0
3 years ago
Choose a landmark that was built in the last 250 years, such as Mount Rushmore, the Eiffel Tower, or the Statue of Liberty. How
Katen [24]

Answer:

<u>Past is key to future and landmarks are ket sign and indicators.</u>

Explanation:

  • Many landmarks have been built in the history of the earth such as the Mount Rushmore, Eiffel Tower, Statue of Liberty and many more the Burj Khalifa, and Berlin wall.  
  • Their basic construct was to put represent civilization like it's in Brazil statue of christ redeemer is know for peace and landmark of Stonehenge on easter island. It depicts a civilization's history and past experiences.
  • landmarks as a way of identifying the place with some characteristics that the place has to offer to the future generation so as they can understand and learn from them. They are marked on the history of the earth's surface.  
  • Some are known for sacrifice, some for rituals, some for freedom and others to represent the amount of power or dominance.
5 0
3 years ago
Hi pls help i’ll give brainliest
nignag [31]

Answer:

Nuclear Fusion that takes place between hydrogen atoms.

Explanation:

The energy comes from the sun and the sun is mostly made up of hydrogen and helium atoms. The sun generates energy from nuclear fusion.

Hydrogen is being converted into helium in the core of the sun. This is called nuclear fusion.

4 0
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