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by tromp 2506 days ago
> in vacuum it's 300 000km/h

300 000 km per second
1 comments
mcdevilkiller 2506 days ago
Are you sure it's km/s? :D
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tromp 2506 days ago
As https://en.wikipedia.org/wiki/Speed_of_light puts it:

"Its exact value is 299,792,458 metres per second (approximately 300,000 km/s"

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phaemon 2506 days ago
Yes, it is.
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