Archimedes and the Door of Science by Unknown

Author:Unknown
Language: eng
Format: epub
Publisher: Mockingbird Press LLC
Published: 2022-07-14T10:01:26+00:00

The weight of any substance, compared to the weight of the same amount, or volume, of water, is called its specific gravity.

Gold is 19 times heavier than the same volume of water. Its specific gravity is 19.3.

Air is about 7 times lighter than water. Its specific gravity is 1/7.

During his experiments, Archimedes discovered that liquids have different densities, just as solid things do. (Gases have different densities, too.)

Water is more dense than oil. If you mix them, won’t the oil always rise to the top of the water? That’s because gravity is pulling on it less.

Very salty water is more dense than fresh water.

If you drop an object into different liquids, it will sink more or less, depending on the density of the liquid. The denser the liquid is, the less the object will sink.

Try this.

Take a pencil stub, between 2 and 3 inches long. You can break one off, but be sure you have the end with the metal band. (It doesn’t matter if the eraser is still there or not.)

Drop the pencil, metal end down, into a tall glass of water. The metal end will weight it so that it floats upright. Look carefully to see how much of the stub sticks out of the water.

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