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MatroZZZ [7]
2 years ago
8

Bomb shelters are found under the school. Some people refer to these areas as the catacombs. true or false?

Biology
1 answer:
Dmitriy789 [7]2 years ago
3 0
That would be false. A catacomb is an ancient underground cemetery.

exact meaning: an underground cemetery consisting of a subterranean gallery with recesses for tombs, as constructed by the ancient Romans.
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Which microscope did Anton van Leeuwenhoek use to observe single-celled organisms?
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<span>Anton van Leeuwenhoek learned to grind lenses ( 1668) and develop simple microscopes.

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Leeuwenhoek heated the middle of a small soda glass rod , over a flame. On pulling apart the two ends, the glass rod elongated into thin whiskers . 
Heating the end of this whisker resulted in a tiny high quality glass sphere. These glass spheres then became the lens of his microscope, with the smallest sphere providing the greatest magnification.

Leeuwenhoek's designs were very basic. The body of the microscope was a single lens mounted in a tiny hole on a brass plate. The specimen was then mounted on a sharp point that sticks up in front of the lens. It's position and focus could be adjusted by turning the two screws.

The entire instrument was about 3 to 4 inches long and had to be held up close to the eye, requiring good lighting and great patience to use.


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2 years ago
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Answer:

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The answer to your question is Letter C   <-- ANSWER

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7 0
3 years ago
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1 mol per dm3 sodium chloride solution

Explanation:

The liquid that would cause the largest decrease in the mass of the potato stick would be the one with  <u>1 mole per dm3 sodium chloride solution.</u>

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Therefore, the potato stick will have the largest decrease in mass in 1 mol per dm3 sodium chloride when compared to the 0.5 and 0.1 mole per dm3 solutions.

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