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Mathematics

Of or pertaining to the study of the measurement, properties, and relationships of quantities and sets, using numbers and symbols.

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Mathematics > Measurements

minute

Mathematics; Measurements

The minute is a unit of time or of angle. As a unit of time, the minute is equal to 1⁄60 of an hour or 60 seconds. As a unit of angle, the minute of arc is equal to 1⁄60 of a ...

hour

Mathematics; Measurements

The hour is a unit of measurement of time. In modern usage, an hour comprises 60 minutes, or 3,600 seconds. It is approximately 1/24 of a mean solar day.

day

Mathematics; Measurements

A day is a unit of time. In common usage, it is an interval equal to 24 hours. It also can mean the consecutive period of time during which the Sun is above the horizon of a ...

week

Mathematics; Measurements

A week is a time unit equal to seven days. It is the standard time period used for cycles of work days and rest days in most parts of the world.

system of measurement

Mathematics; Measurements

A system of measurement is a set of units of measurement which can be used to specify anything which can be measured and were historically important, regulated and defined because ...

time zone

Mathematics; Measurements

A time zone is a region that has a uniform standard time for legal, commercial, and social purposes. It is convenient for areas in close commercial or other communication to keep ...

sidreal time

Mathematics; Measurements

Sidereal time is a time-keeping system astronomers use to keep track of the direction to point their telescopes to view a given star in the night sky. Briefly, sidereal time is a ...