1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
yuradex [85]
2 years ago
5

Strontium-90 has a half life of 29 years, how much strontium-90 is left from the Chicago pile reactor that was active around 87

years ago.
Biology
1 answer:
agasfer [191]2 years ago
6 0

Answer:

The answer is below

Explanation:

The half life of a substance is the time required by that substance to reduce to half of its initial value. The half life is calculated using the formula:

N(t)=N_o(\frac{1}{2} )^\frac{t}{t_\frac{1}{2} } \\\\where\ N(t)=quantity\ of\ substance \ remaining, N_o=initial\ quantity\\of\ substance, t=time\ and \ t_\frac{1}{2}=half\ life\ of\ substance

Given that t = 87 years, half life = 29 years, therefore the quantity of strontium-90 left is:

N(t)=N_o(\frac{1}{2} )^\frac{87}{29} \\\\N(t)=N_o(\frac{1}{2} )^\frac{t}{t_\frac{1}{2} } \\\\N(t)=N_o(\frac{1}{2} )^3\\\\N(t)=\frac{1}{8} N_o

That is one-eight of Strontium 90 would be left after 87 years

You might be interested in
Arrange the phases of mitosis
Vikentia [17]

Answer:

Alright, sure thing.

Explanation:

These phases are prophase, prometaphase, metaphase, anaphase, and telophase.

8 0
3 years ago
Read 2 more answers
Each daughter cell resulting from mitotic cell division has exactly the same genetic composition. Select one: True False
sveta [45]

Answer: True

Explanation: The importance of mitotic cell division is to produce two daughter cells that are genetically identical. The genetic materials of the parent cell are arranged and moved towards the two spindle poles with the help of the spindles so that there will be an even distribution of the parent cell's genetic materials between the resulting two daughter cells.

6 0
3 years ago
A 24-year-old mother who is a smoker and cocaine addict gave birth at 39 weeks to a 2,000-gram female infant who is in the neona
Lelu [443]

thats a mean mother bro

7 0
3 years ago
Read 2 more answers
What is the name for the number of species that live in an ecosystem
Snowcat [4.5K]

Answer:

species richness is the number of species in an ecosystem

4 0
3 years ago
After staining endospores will be ___ in a ____ cell
notka56 [123]

After staining endospores will be green in a parent cell. Staining endospore is difficult as the bacteria do not allow stains to be attach to the spore. This is why there is a need to use heat to let the main stain which is Malachite green into the endospore. 

8 0
3 years ago
Other questions:
  • How does meiosis help explain Mendel’s independent assortment
    12·1 answer
  • How is the density of ocean water affected by temperature and water?
    15·1 answer
  • In which phase of the eukaryotic cell cycle do microtubules arrange in preparation for mitosis? answer cytokinesis, g1 phase, g2
    15·1 answer
  • Which of the following is not a characteristics of life
    13·2 answers
  • Complete the diagram pictured on the right by identifying each missing label.<br><br> A blank
    11·2 answers
  • What is the relationship between the two parts of the nervous system?
    7·2 answers
  • What are some methods scientists have discovered that can stop a virus from spreading in its host? (Choose all that apply)
    13·1 answer
  • explain why eating down a food chain," vegetables instead of meat for example, is more energy efficient
    14·1 answer
  • What is soil salinization
    13·2 answers
  • How are the modes for reproduction different in unicellular and multicellular organism.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!