Question

describe an are hourglass explain the principle of making it​

Answer 1

Answer:

Answer. Hourglass, a device for measuring time. ... Sand or a liquid (such as water or mercury) in the uppermost section of a true hourglass will run through the neck into the lower section in exactly one hour. By turning the other end up, another hour may be marked, and the process may be continued indefinitely.

Answer 2

Explanation:

Hourglass, a device for measuring time. ... Sand or a liquid (such as water or mercury) in the uppermost section of a true hourglass will run through the neck into the lower section in exactly one hour. By turning the other end up, another hour may be marked, and the process may be continued indefinitely.