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How fast is 10,000 kilometers per hour?

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It's about one-fifteenth as fast as a Meteor
In other words, the speed of a Meteor is 15 times 10,000 kilometers per hour.
(formally Meteoroid or meteorite, depending on the context; a.k.a. "shooting star", a.k.a. "falling star")
Small meteoroids enter the Earth's atmosphere at speeds between 40,000 kph and 260,000 kph, depending on their size. The fireball effect, known as ablation, ceases once the atmosphere has slowed the meteoroid to a velocity of about 10,000 kph.
It's about one-thirty-fifth as fast as a bolt of Lightning
In other words, the speed of a bolt of Lightning is 36 times 10,000 kilometers per hour.
(atmospheric electrical discharge)
A bolt of lightning can travel at up to 350,000 kph when arcing from the atmosphere to the Earth. An estimated 280 million lightning strikes strikes occur each year.
It's about one-one-hundred-thousandth as fast as The Speed of Light
In other words, 10,000 kilometers per hour is 0.00000926566931105980 times the speed of The Speed of Light, and the speed of The Speed of Light is 107,925.284880 times that amount.
(C) (in a vacuum)
The speed of light (and all other electromagnetic radiation) in a perfect vacuum is known as "c" and measures 1,079,252,848.80 kilometers per hour, per the formal definition of the meter. While visible light travels close to this speed in air, it slows to 719,501,899.2120 kilometers per hour when passing through the glass of a typical window.