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Shalnov [3]
3 years ago
10

in 1907, Duncan preformed a series experiments in which he attempted to measure the weight of a soul as it left a dying person i

n his experiment McDowell cool place a dying person on a scale and measure their weight immediately prior to the following death. McDowell determined the change and weighed approximately 21 grams for the experiments he concluded the soul exists and has mass what is the fundamental scientific flaw in his conclusions ​
Biology
1 answer:
Luba_88 [7]3 years ago
7 0

Answer:

The flaw is that he is studying pseudoscience (fake science) and he did not repeat his experiments in any form of trials.

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What is the cleanest burning fossil fuel?
Alexandra [31]
Natural gas (methane (CH4)) is the cleanest burning fuel<span>, emitting the smallest amount of carbon dioxide of all the </span>fossil fuels<span> (coal, oil and natural gas).</span>
7 0
3 years ago
Since prokaryotic cells _______________________, they have the ability to adapt faster to changing environmental conditions than
I am Lyosha [343]

Since prokaryotic cells are haploid, they have the ability to adapt faster to changing environmental conditions than eukaryotic cells.

<h3>What are prokaryotic cells?</h3>

Prokaryotic cells are cells that are characterized by the absence of a nucleus or any other membrane-bound organelles.

On the other hand, eukaryotic cells have the presence of a membrane-bound nucleus that stores their genetic material.

Another important feature of prokaryotic cells is that they are haploid in nature i.e. they do not have chromosomes that occur in homologous pairs and have just one chromosome.

Therefore, it can be said that because prokaryotic cells are haploid, they have the ability to adapt faster to changing environmental conditions than eukaryotic cells.

Learn more about prokaryotic cells at: brainly.com/question/18348786

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7 0
1 year ago
Scientists always prove or disprove their explanations by _____.
Amanda [17]

Correct answer: A). Gathering evidence

The scientific explanation uses measurements and observations in order to explain something in the natural world. The Scientist uses the scientific method to collect evidence in the experiment that is related to the hypothesis.

They can gather the evidence by just observing the natural world and its phenomena or by performing an experiment in the laboratory or by running a model.

Hence, the correct answer would be option A.

4 0
3 years ago
The bones from an animal found at an archaeological dig have a C614 activity of 0.10 Bq per gram of carbon. The half-life of C61
erastova [34]

C14 is an isotope used in radiocarbon dating techniques to date organic matter remains. The age of these bones is approximately<u> 6890 years.</u>

<h3>What is Carbon 14?</h3>

Carbon 14, also known as radiocarbon, is a radioactive carbon isotope.

Isotopes are the atoms of the same element -carbon- that vary in neutrons and, hence, in their massic number. They are alternative forms of the same element.

The radioactive C14 nucleus contains 6 protons and 8 neutrons and has a half-life of 5730 years.

The term half-life is a reference. It means that an organism that has been dead for 5730 years has half the C14 amount or concentration than the same organism had when it was alive.

Knowing the half-life of an element is useful to determine the age of the dead matter.

C14 is used in radiocarbon dating techniques or methods to estimate the age of fossils. This is a reliable technique used for dating organic samples that are less than 50,000 years old.

<u>Available data</u>:

  • The half-life of C14 is 5730 years
  • Bones activity of 0.10 Bq per gram of carbon

To answer this question we can make use of the following equation

Ln (C14T₁/C14 T₀) = - λ T₁

Where,

  • C14 T₀ ⇒ Amount of carbon in a living body. We know, by bibliography, that living organism activity is 0.23 Bq per gram of carbon. So, C14 T₀ = 0.23 Bq/g
  • C14T₁ ⇒ Amount of carbon in the dead body. C14T₁ = 0.1 Bq/g
  • λ ⇒ radioactive decay constant = (Ln2)/T₀,₅
  • T₀,₅ ⇒ The half-life of carbon 14 = 5730 years
  • T₀ = Time when the organism was alive
  • T₁ = Age of bones

Let us first calculate the radioactive decay constant.

λ = (Ln2)/T₀,₅

λ = 0.693/5730

<u>λ = 0.0001209</u>

Now, let us calculate the first term in the equation

Ln (C14T₁/C14 T₀) = Ln (0.1/0.23) = Ln 0.4347 =<u> - 0.833</u>

Finally, let us replace the terms, clear the equation, and calculate the value of T₁.

Ln (C14T₁/C14 T₀) = - λ T₁

- 0.833 = - 0.0001209 x T₁

T₁ = - 0.833 / - 0.0001209

T₁ =  6889.99 ≅ <u>6890 years</u>

The bones are approximately<u> 6890 years.</u>

You can learn more about dating organic matter with carbon14 at

brainly.com/question/4149380

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6 0
2 years ago
An organism must have a ________ in order to be considered living.
lesantik [10]
I would say C.nervous system because that pretty much defines all of the answer choices.
6 0
3 years ago
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