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A broken-down spaceship (Star Wreck?) flies across an international soccer field (regulation length = 100 m) at a speed of 0.55c.
a) How long does the spaceship pilot measure the field to be?
b) from the spaceship pilot's prespective, how long does it take to make this dash?
c) how long does this spaceships's flight take, according to ground observers ?
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A large piece of cork weighs 0.295 N in air, he spring scale reads 0.903 N. Find the density of the cork
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