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Saturday, December 15, 2012
Speed of rotation of the Earth (our Natural Spacecraft)
Approximate values just to show comparison:
Average walking speed --- 3 mph
Average running speed --- 10 mph
Typical speed of car in highway --- 70 mph
Top speed of cheetah, the fastest land animal on Earth --- 70 mph
Wind speed of a strong tornado --- 300 mph
Speed of commercial airplane --- 500 mph
Speed of sound in air --- 750 mph
Speed of earth's rotation in its axis --- 1000 mph
Escape velocity from the Earth --- 25,000 mph
Escape velocity from Earth of a NASA spacecraft --- 36,000 mph
Speed of earth's revolution around the sun --- 67,000 mph
Speed of light --- 670,000,000 mph
So, just by sitting on your couch watching TV, smiling, laughing......perhaps most of us, without even realizing, we are RIDING IN A "SPACECRAFT" (which is the Earth, a natural "spacecraft"), spinning twice faster than the speed of a commercial airplane, rotating around its axis at speeds greater than the speed of sound, and revolving around the sun at speeds about twice the escape velocity of a NASA spacecraft.
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