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Using the Graph Above, How Fast Must Velma Move Past

Question 16

Multiple Choice

Using the graph above, how fast must Velma move past Mort if he is to observe her spaceship's length to be reduced by 50%?

A) about 25% of lightspeed
B) about 85% of lightspeed
C) 70% of lightspeed
D) 50% of lightspeed
E) about 95% of lightspeed

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