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
vaieri [72.5K]
4 years ago
8

Scientists found a fossilized bone from an organism at an excavation site in North Dakota. When they took the bone back to the l

ab, they realized that the bone had only 12.5% of the total carbon-14 left. Based on the amount of carbon-14 left in the bone how old is the bone if the half-life of carbon-14 is 5730 years?
Biology
2 answers:
jeka57 [31]4 years ago
8 0

Answer: 17328.7 years

Explanation:

Half-life of sample of carbon-14 = 5730 years

\lambda =\frac{0.693}{t_{\frac{1}{2}}}=\frac{0.693}{5730}=1.2\times 10^{-4} years^{-1}

N=N_o\times e^{-\lambda t}

N = amount left = 12.5 g

N_0= initial amount = 100 g

\lambda= disintegration constant= 1.2\times 10^{-4} years^{-1}

t= ?

12.5=100\times e^{-1.2\times 10^{-4}\times t}

t=17328.7years

Thus the bone is 17328.7 years old.

dedylja [7]4 years ago
5 0
T = 3⋅5,730 = <span>17,190 years</span>
You might be interested in
HURRY URGENT!!! WILL GIVE BRAINIEST!!!! <br><br> what do hawks eat?
Assoli18 [71]
Hawks typically eat mouses, voles, rats, squirrels, and rabbits.<span />
8 0
4 years ago
HELP ASAP ASAP FOR NOW
love history [14]

Answer:

chemical energy

Explanation:

Photosynthesis is the process in which light energy is converted to chemical energy in the form of sugars. In a process driven by light energy, glucose molecules (or other sugars) are constructed from water and carbon dioxide, and oxygen is released as a byproduct.

3 0
3 years ago
Which of the following components of the immune system is the target for vaccinations?
gulaghasi [49]

Answer:

The correct answer is option D. the adaptive immune system.

Explanation:

The adaptive immune system is the immune system that takes place after the first exposure to a specific antigen either from vaccination or a pathogen. Adaptive responses are of two types: the cell-mediated and humoral immune response, the cell-mediated immune response occurs with the help of T cells, and where is humoral immune response is B cells and antibodies.

Vaccination targets the adaptive immune system as they produce antibodies against the pathogen provided by vaccination.

Thus, the correct answer is option D. the adaptive immune system.

3 0
3 years ago
One kind of radiation not released by radioactive decay is ______.
aalyn [17]
One kind of radiation not released by radioactive decay is radiation
4 0
3 years ago
The burrowing owl is found in dry, open areas such as grasslands, prairies, savannas, deserts, farmlands, golf courses, and othe
Sveta_85 [38]
The population of the burrowing owl will be reduced or even become extinct 
3 0
3 years ago
Read 2 more answers
Other questions:
  • What lies outside the cell membrane in plants algae and fungi not animal cells.provides support and protection for the cell
    5·1 answer
  • Illah?
    6·2 answers
  • 10. Which combination of climate factors generally result in the coldest temperatures ?
    14·1 answer
  • What was the independent variable in this experiment? Help
    8·2 answers
  • 1. Describe the developments that led to the cell theory.
    10·1 answer
  • Which of the following experimental results does NOT support the idea that
    8·2 answers
  • _____ consists of related technologies that try to simulate and reproduce human thought behavior, including thinking, speaking,
    6·1 answer
  • Which of the following statements about screening for prostate cancer is most accurate?
    5·1 answer
  • Describes a method in studying plate movements?
    11·1 answer
  • Which of the following causes a frameshift mutation?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!