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Ivenika [448]
2 years ago
8

If air is a fluid, why do we not include the buoyant force caused by the displacement of air by the objects in this experiment?

Explain your answer carefully. (Hint: Pwater = 1000 kg/m^3)

Chemistry
1 answer:
uysha [10]2 years ago
5 0

Archimedes' principle allows us to find that the reasons why the thrust is not written when a body is in the air is:

  • The thrust of air is about 800 times less than the thrust of a fluid
  • In general the other forces (weight, tension) are much greater than thrust

Archimedes' principle establishes that the thrust is equal to the weight of the dislodged liquid (fluid)

        B = ρ g V

Where B is the thrust, ρ and V the density and volume of the fluid, respectively, g the acceleration due to gravity.

In the attachment you have a diagram of a system in equilibrium in air and water, we can see that in the two cases for a system in equilibrium

                         B -W = 0

                         B = W

Let's find the value of the thrust in each case and compare

               B_{air} = \rho_{air} g V_{air}

               B_{water} = \rho_{water} \ g V_{water}

Used the density

               \rho_{air} = \  1.26 \  kg/m^3 \\\rho_{water} = 997 kg/m^3

               B_{air} = 1.26 \ g \ V_{air}\\B_{water} = 997 \ g \ V_{water}

Suppose that the volume of the two bodies is the same

               B_{water} = 792 B_{air}r

           

We can see that the thrust in air or other gas is about 800 times less than the thrust in liquids. This is the reason that in many problems the thrust is not written when the body is in the air.

In conclusion, using Archimedes' principle, we find that the reason why the healed thrust is not written for a body is in the air is:

  • The thrust of air is about 800 times less than the thrust of a fluid
  • In general the other forces (weight, tension) are much greater than thrust

Learn more about Archimedes' principle here:

brainly.com/question/787619

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What mass of oxygen (O2) forms in a reaction that forms 15.90 g C6H12O6? (Molar mass of O2 = 32.00 g/mol; molar mass of C6H12O6
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The answer is: the mass of oxygen is 16.95 grams.

The overall balanced photosynthesis reaction:  

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n(C₆H₁₂O₆) = m(C₆H₁₂O₆) ÷ M(C₆H₁₂O₆).

n(C₆H₁₂O₆) = 15.9 g ÷ 180.18 g/mol.

n(C₆H₁₂O₆) = 0.088 mol; amount of glucose.

From chemical reaction: n(C₆H₁₂O₆) : n(O₂) = 1 : 6.

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The missing information or their role in the discovery of the cell is as follows:

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A. Leeuwenhoek: he was a microscopist and microbiologist who used microscopes and observed many other living cells. He called animalcules to these single-cell living organisms later used to prove that cells are the fundamental unit of life.

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Answer:

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