km/sec
Americanabbreviation
Example Sentences
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This is possible," explains Massachusetts Institute of Technology geophysicist M. Nafi Toksoz, "because seismic waves propagate through the earth's crust relatively slowly, 5 to 8 km/sec.
From Time Magazine Archive
Whatever the reason for the flicker, information on when to turn on and off can cross Cyg X-l no faster than the speed of light, 300,000 km/sec.
From "Cosmos" by Carl Sagan
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