Comment by drillsteps5
16 hours ago
Can someone please please PLEASE tell SpaceX PR/Streaming team that the speed (per SI system) is measured in meters per second, not kilometers per hour? The speed of sound is approx 300 m/s, orbital velocity is approx 8,0000 m/s (depending on altitude), free fall acceleration on Earth is 9.81m/s, 1.63m/s on the Moon, the speed of light is apporx 300,000,000 m/s, people learn these numbers in middle school. It's not 1000 km/h, or 28,000 km/h, it just looks so weird.
Edit: ok, acceleration is meters per second per second, but my point stands.
They are likely appealing to the common population who mostly think of speed in mi/h or km/h due to car speeds
I understand the appeal of using the same combinations everywhere, but I thought the great thing about the metric system was that it was easy to convert. So 8000 m/s is 8 km/s.
The problem is with the "hours" part. Which, not accidentally, is not even part of the SI.
In the official BIPM brochure, hours are technically classified as "Non-SI units accepted for use with SI." This puts them in the same category as liters, hectares, tonnes, decibels, etc.
https://en.wikipedia.org/wiki/Non-SI_units_mentioned_in_the_...
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