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Who was christa mcauliffe and what happened this year to make her dream come true?
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Several mountains together form a mountain . a few of these combined form a mountain system. several systems combined form a mountain , which can stretch thousands of miles in length.
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1400 kg car has a speed of 27 m/s. if it takes 7 s to stop the car, what is the impulse and the average force acting on the car?
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Who was christa mcauliffe and what happened this year to make her dream come true?...
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