Related questions with answers

Latitude can be identified by knowing the date and measuring the Sun’s ______.

If it is 12 noon in London, what is the standard time in Sydney, Australia $\left(34^{\circ} \mathrm{S}, 151^{\circ} \mathrm{F}\right)$ ?

What is the meaning of a.m. and p.m.? How about GMT and UTC?

Question

What is the standard unit of time, and how is the length of a day defined?

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The standard unit of time is second, and it's now defined in terms of the frequency of a certain transition in the cesium atom.

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