Explain why GMT is 0+ UTC. I'll give brainliest

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17-03-2024
Geography

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Explain why GMT is 0+ UTC. I'll give brainliest

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notyocheeze notyocheeze · Answer 1 · 2024-03-17T22:43:35+01:00

Answer: GMT (Greenwich Mean Time) and UTC (Coordinated Universal Time) are both time standards used as reference points for timekeeping around the world.

GMT was established at the Royal Observatory in Greenwich, England, and historically it was based on the mean solar time at the Prime Meridian, which passes through Greenwich. It served as the standard time for much of the world for many years.

UTC, on the other hand, was introduced in the 1960s as a more precise and globally standardized timekeeping system. It is based on atomic time and is kept in sync with the rotation of the Earth through the addition or subtraction of leap seconds as necessary to keep it within 0.9 seconds of UT1, which is a measure of Earth's rotation.

GMT and UTC are often used interchangeably, but technically, they are not exactly the same. GMT is a time zone, whereas UTC is a time standard. However, they are usually equivalent for practical purposes, with the main difference being the method of determining the time.

Explanation:

The reason why GMT is often denoted as "GMT+0" or "GMT-0" is because it serves as the reference point for time zones around the world. Time zones are typically denoted as offsets from GMT, with time zones to the east being ahead of GMT and time zones to the west being behind GMT. So when GMT is denoted as "GMT+0" or simply "GMT," it means that it is at zero offset from itself, which is essentially equivalent to UTC.

chibabykalu16 chibabykalu16 · Answer 2 · 2024-03-17T22:44:08+01:00

Explanation:

Greenwich Mean Time (GMT) is the name of the time zone, while Coordinated Universal Time (UTC) is a term for a time system that also has its normal state on the zero meridian. GMT is based on astronomical observations, while UTC is based on atomic clocks. GMT corresponds to the UTC 0 time zone, which is the Coordinated World Time with an offset of 0 hours.

UTC is not a time zone, but an atomic time scale that only approximates GMT. UTC replaced GMT as the World Standard for time in 1972.

GMT is still the standard time for the Prime Meridian (Zero Longitude) and civil time in UK when Daylight Saving Time is not in use. For example, the United Kingdom is not on GMT all year, it uses British Summer Time (BST), which is one hour ahead of GMT, during the summer months.

GMT should thus not be used for purposes that require precision.