if a sample known to be about 11,460 years old and has 400 carbon 14 Adams how many atoms are in the sample when organisms just died
Answer:
There are 1600 atoms when organism just died.
Explanation:
The statement is incorrect. The correct statement is:
If a sample known to be about 11,460 years old and has 400 carbon 14 atoms. How many atoms are in the sample when organisms just died?
The amount of atoms associated with radioactive isotopes decreases exponentially in time by means of the following formula:
[tex]n(t) = n_{o}\cdot e^{-\frac{t}{\tau} }[/tex] (1)
Where:
[tex]n_{o}[/tex] - Initial amount of atoms.
[tex]n(t)[/tex] - Current amount of atoms.
[tex]t[/tex] - Time, measured in years.
[tex]\tau[/tex] - Time constant, measured in years.
In addition, the time constant can be calculated in terms of the half-life of the radioactive isotope ([tex]t_{1/2}[/tex]), measured in years:
[tex]\tau = \frac{t_{1/2}}{\ln 2}[/tex] (2)
If we know that [tex]t_{1/2} = 5,730\,yr[/tex], [tex]t = 11,460\,yr[/tex] and [tex]n(11,460\,yr) = 400[/tex], then the initial amount of atoms is:
[tex]n_{o} = \frac{n(t)}{e^{-\frac{t}{\tau} }}[/tex]
[tex]\tau = \frac{5,730\,yr}{\ln 2}[/tex]
[tex]\tau \approx 8,266.643\,yr[/tex]
[tex]n_{o} = \frac{400}{e^{-\frac{11,460\,yr}{8,266.643\,yr} }}[/tex]
[tex]n_{o} \approx 1600[/tex]
There are 1600 atoms when organism just died.
tall pea plants are dominate over pea plants if two hybrids (Tt) are crossed
Answer:
Naruto usamaki is the greatest hokagey in the leaf village
What happens to excess carbohydrates in animals?
They are stored as fat.
They are stored as protein.
They are stored in nucleic acids.
They are stored as sugar.
Answer:
A-They are stored as fat.
Explanation:
In animals, the excess of carbohydrates or glucose is first converted into glycogen (polysaccharide) through the process called glycogenesis. ... When glycogen reservoirs are saturated, excess carbohydrates, as well as proteins, are converted into fats which are then majorly stored in adipose tissues.
Which statement best describes how a generator works ?
Answer: Looks like the answer is B
Answer: I think It's B.
Explanation:
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sharks
The vertebrate with the fewest bones are probably sharks (and relatives), which have a skeleton made mostly of cartilage; only their jaws are bone. The vertebrate with the fewest bones are probably sharks (and relatives), which have a skeleton made mostly of cartilage; only their jaws are bone.
Which of these characteristics is often used as a measure of an ecosystems health? A. The variety of species that lives there B. The number of people who live there C. The amount of population that occurs there D. The types of activities that can be done there
Answer:
A
Explanation:
Because the more species that live their can determine how well the environment is doing.And that their is enough resources for them to survive.
Is sand called sand because its in between the sea and the land?
I'm asking the questions that need to be asked people! :'D
No, not at all. ... The English word 'sand' comes from Old Dutch/proto-German 'zand', which has nothing to do with either sea OR land, but referred originally to unstable ground, as near rivers.
I hate the English language sometimes, like: "waterfall". But anyways, I hope this helps ^^
Hmmm... I've never thought of that before... nice catch lol
Have a great day :D
Help me with this I’ll give 50points !!
Answer:
straightLustre,shinemirror Transparent,propertynot at depth,faster 7.oblique,blocksHope it helps
Which accurately describes reproduction in gymnosperms? Select four options. Some require heat for seed dispersal. Female cones produce pollen. Most gymnosperms produce male and female cones. Fertilized ovules grow into seeds. Male and female cones may grow on the same plant.
Answer:
A, C, D, and E are corecct
Explanation:
Some require heat for seed dispersal.Most gymnosperms produce male and female cones. Fertilized ovules grow into seeds. Male and female cones may grow on the same plant.Answer:
A C D E
Explanation:
I just took the quiz and got the question right
Cellular respiration “ adds or removes” carbon dioxide from the atmosphere
Answer:
'Adds' is the correct option
Explanation:
During cellular respiration, glucose and oxygen are changed into energy and carbon dioxide. Therefore, carbon dioxide is released into the atmosphere during the process of cellular respiration.
1. What is the function of the Circulatory/Cardiovascular System?
2. Why do you need to have blood circulate to all the parts of the body?
Answer:
1. Attires carry blood away from the heart and veins carry blood back to the heart. The circulatory system Carrie's oxygen, nutrients and hormones to cells, and removes waste products like carbon dioxide. These roadways travel in one direction only, to keep things going where they should
Answer:
Explanation:
So your body can function properly. Its what make our bodies work. It also supplies oxygen to the brain and other organs and promotes healthier skin
Veronica wrote Charles Darwin’s main points on the board, but she made a mistake in one point.
1. Since more offspring are produced than an environment can support, organisms within a population must compete for resources to survive.
2. Due to variations within the population, some competitors will be better equipped for survival than others.
3. The best-equipped organisms will survive and will produce well-equipped offspring.
4. Variations that help with survival will be passed on to future generations and will rapidly change the whole population.
Which point is flawed as written above?
point 1
point 2
point 3
point 4
Answer: the answer is 4. Variations that help with survival will be passed on to future generations and will rapidly change the whole population.
Explanation:
!!PLEASE HELP RN!! what are 3 similarities that dominant and recessive alleles have?
Answer:
When an allele is dominant, the characteristic it is connected to will be expressed in an individual. When an allele is recessive, the characteristic it is connected to is less likely to be expressed. Recessive traits only manifest when both alleles are recessive in an individual.
Explanation:
Answer:
we've found a lot of dominant alleles to be gain of function, whereas recessive alleles tend to be loss of function.
11. Cheetahs have been through a genetic bottleneck; evidence for this is that
A little natural selection occurs in this species.
B. the body is long thin, and graceful.
c. there is very little genetic variability.
D. these cats are members of an endangered species.
E. they originally came from sm all areas of Africa.
Cheetahs have been through a genetic bottleneck; evidence for this is that there is very little genetic variability (Option c).
What is a genetic bottleneck?A genetic bottleneck is a natural process where a population and/or species lost part of this genetic diversity.
A genetic bottleneck is a process that can be caused by catastrophic natural disasters.The genetic bottleneck is evidenced by the lack of genetic variability.In conclusion, cheetahs have been through a genetic bottleneck; evidence for this is that there is very little genetic variability (Option c).
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what was not included in john dalton's description of the atom
Answer:
Nucleus containing protons and neutrons and electrons
Explanation:
Answer:
This is what i found-
Explanation:
The indivisibility of an atom was proved wrong: an atom can be further subdivided into protons, neutrons and electrons. However an atom is the smallest particle that takes part in chemical reactions. According to Dalton, the atoms of same element are similar in all respects.
The charged particles in the beams that Thomson studied came from atoms. As these particles moved away from their original atoms, they formed a visible beam. The current model of the atom includes protons, neutrons, and electrons.
What is the best use of an atomic model to explain the charge of the particles in Thomson’s beams?
An atom’s negative particles are surrounded by positive matter, so the positive particles are easier to remove.
An atom’s positive particles are surrounded by negative matter, so the negative particles are easier to remove.
An atom’s smaller negative particles are at a distance from the central positive particles, so the negative particles are easier to remove.
An atom’s larger positive particles are at a distance from the central negative particles, so the positive particles are easier to remove.
The question to the above information is;
What is the best use of an atomic model to explain the charge of the particles in Thomson's beams?
Answer;
An atom's smaller negative particles are at a distance from the central positive particles, so the negative particles are easier to remove.
Explanation;
-Atoms are comprised of a nucleus consisting of protons (red) and neutrons (blue). The number of orbiting electrons is the same as the number of protons and is termed the "atomic number" of the element.
J.J. Thomson discovered the electron. Atoms are neutral overall, therefore in Thomson’s ‘plum pudding model’:
atoms are spheres of positive chargeelectrons are dotted around insideAnswer:
Its C on edge
Explanation:
What happens during the four stages of mitosis (prophase, metaphase, anaphase, and
telophase). Describe what the chromosomes and nucleus are doing during each stage.
According to the diagram, what happens to the female population between
the ages of 9 and 19?
A. It triples in size, from 3 to 9 individuals.
B. It grows steadily.
C. It remains the same size.
D. It drops from 9 to 3 individuals
Answer:
D is the correct answer
Explanation:
It drops from 9 to 3 individuals to the female population between the ages of 9 and 19.
What is population?A population is made up of every organism of a specific species that resides in a specific location. Demography is the statistical study of populations and how they evolve through time.
Population size, or the total number of people, and population density, or the number of people per unit of space or volume, are two crucial indicators of a population. Ecologists use quadrats and the mark-recapture technique to evaluate the size and density of populations.
A population of organisms may be dispersed randomly, uniformly, or clumped. When a population is described as uniform, it is evenly spaced, random indicates uneven spacing, and clumped, it is dispersed in groups.
Therefore, It drops from 9 to 3 individuals to the female population between the ages of 9 and 19.
To learn more about population, refer to the link:
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The image below shows how wolves and dogs compare to some other animals in the levels of classification.
Based on this chart, which pair of organisms are most closely related?
Insect and rabbit
Cat and rabbit
Insect and fish
Cat and wolf
the constitution says laws passed by Congress are_______to state laws
ANSWER: The constitution says laws passed by Congress are superior to state laws
PLEASE GIVE BRAINLIEST!
TY AND HAVE A NICE DAY
the reactants of photosynthesis are
a: organic compounds
b: glucose and sunlight
c: glucose and water
d: glucose and carbon dioxide
e: water and carbon dioxide
Answer:
I think its e
Explanation:
Photosynthesis requires sunlight, carbon dioxide, and water as starting reactants
MARKIN PEOPLE AS BRAINLIST THANK YOU 16 points:)
Research Careers in Science - Geneticist. Find out what you can on how someone would study to be a geneticist. Write up a summary of what you learned :)
Which option percent of valid hypothesis in the correct form?
A if a cotton plant receives 100 ml of water ever day it will display steady growth
B if cotton plant need consistent amount of water to grow steadily than the cotton plant that receives 100 mL of water Everyday Will displayed study group
C if a cotton plant needs a constant amount of water to grow steadily than a contact that displays Teddy Grove and you will receive a hundred mL of water every day
D the cotton plant displays steady growth it will receive 100 ml of water every day
Fossil remains of Glossopteris (an extinct plant with large leaves) have been discovered in India and Australia. When they were living, all the Glossopteris were located together on land, but now the Glossopteris fossils are separated by an ocean. What could explain how these fossils got so far apart?
Answer:
Due to splitting of lands.
Explanation:
These Glossopteris fossils got so far apart from each other because of the splitting of super continent about 175 million years ago. Before 175 million years, India and Australia are attached to each other and these Glossopteris plants are present on these lands but with the passage of time, the lands of India and Australia split and go far away from each other so due to splitting of lands, these fossils got so far apart from each other.
why is it important to have maps of the ocean floor, such as those gathered with SeaBeam technology
Since oceans cover 71% of the Earth’s surface, understanding what the seafloor looks like, and where different processes, such as ocean currents are active, is hugely important. Mapping the seafloor helps to work out things like where different types of fish live, where resources may be, such as rare metals and fossil fuels, and whether there is a risk of underwater landslides happening that might cause a tsunami. Mapping the seafloor is very challenging, because some cannot use the same techniques that some would use on land. To map the deep ocean, there's a tool used called a multibeam echo-sounder, which is attached to a ship or a submarine vessel.
⚠️Second time posting this⚠️
the factors that control genes are called "alleles".
True
or
false
Answer
Explanation:
I think its true
Inherited used in a sentence
Which benefits do mangrove trees provide to surrounding coastal wetlands?
1 . They hold soil in place.
2 . They store floodwaters.
3 . They maintain surface water flow.
4 . They filter water and improve water quality.
Answer: A and D or 1 and 4
Explanation:
Answer:
it is 1 and 4. if its a one choice question it is most likely 1
Explanation:
trees dont usually filter the water. they take in the water through their roots. trees usually hold soil in place. it cant be 2 or 3 because they dont make sense.
Combined sewage overflow has been linked to eutrophication in ecosystems within NYC, including Jamaica Bay and Coney Island Creek. Based on your understanding of eutrophication, why might combined sewage overflow be causing an overgrowth of harmful algae in NYC? Explain your answer in YOUR OWN WORDS please.
(This is 7th grade science).
like your name
Explanation:
Which two traits are acquired during a person's lifetime?
O A. Dimpled cheeks
O B. A back injury
O C. A short haircut
O D. Brown eyes
Answer:
B and C
Explanation:
Technically these are not traits. They are subjects that someone has acquired over the period of their life.
Hope this helps :D Have a great day
Answer:it's b and c
Explanation:
Trust me