The horizontal fraction bar was introduced by the Arabs.
Did you know?
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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People about to have surgery must tell their health care providers about all supplements they take.
Did you know?
Everyone has one nostril that is larger than the other.
Did you know?
More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.
The Scale of Life 1
Urinometer. In this procedure, a urine sample and urinometer are placed within a tube, and the liqui