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Anastasy [175]
3 years ago
6

Who did not have experimental evidence to support his theory of the atom? Dalton Thomson Rutherford Democritus

Physics
1 answer:
Aloiza [94]3 years ago
3 0

Democritus was the one who did not have experimental evidence to support his theory of the atom.

Answer: Option 4

<u>Explanation: </u>

The discovery of atoms were first stated by Democritus but due to the absence of any experimental proof, his statement was not noted as significant at that time.

After this, Dalton made the specific assumptions formulating some postulates for the atomic theory with proof. Then the cathode rays tube experiments performed by Thomson lead to the formation of plum pudding models of atom.

This is followed by Rutherford’s gold foil experiment discovering the presence of nucleus inside the atoms. So, Democritus first stated but due to absence of experimental evidences, his theory of atoms were not supported at that time.

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artcher [175]

Answer:

(a) 92 %

(b) 6.76 %

Explanation:

length, l = 4 m, height, h = 5 m, width, w = 3 m, density of water = 1000 kg/m^3

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(a) Let v be the volume of ice below water surface.

By the principle of flotation

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Volume immersed x density of water x g = Total volume of ice block x density

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v x 1000 x g = V x 920 x g

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(b) Let v be the volume of ice below the mercury.

By the principle of flotation

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Volume immersed x density of mercury x g = Total volume of ice block x  

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v x 13600 x g = V x 920 x g

v / V = 0.0676

% of volume immersed in water = v/V x 100 = 0.0676 x 100 = 6.76 %

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