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OpenStudy (anonymous):
Although there are rumors of new aircraft that can fly at much higher speeds, the current official and unclassified record holder is still the Lockheed SR-71 Blackbird, a high-altitude spy plane. Fully loaded, the Blackbird has a mass of 7.7 × 104 J kg, and at top speed it has a kinetic energy of 3.7 × 1010 J. What is the top speed of the SR- 71? Can someone help I don't understand this. Thanx (:
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OpenStudy (anonymous):
I would post this in the physics section!
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