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In the equation E=mC^2 is the mass content of the motion displace at the speed of ligtht irrespective of the gravity field.? Given a 12-question true-false quiz, what is the probability of answering exactly 5 of the questions correctly by guessing? What kind of plants are healthy foods made of? Will humans ever evolve into birds? How many people can sit on a 4000 square foot capacity?