The first successful U.S. satellite, Explorer I, was launched into Earth orbit by the Army on Jan. 31, 1958, at Cape Canaveral, Florida, four months... Read More
scientific-instruments
What is a Chronograph?
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A chronograph is a timepiece capable of measuring discrete elapsed time units as well as telling time in a 12-hour format. In such a watch,... Read More
Altimeter: an apparatus used in aircraft for measuring altitudes. Ammeter: is used for to measure intensity of sound. Anemometer: is an instrument for measuring the... Read More