If you drive at the posted speed limit of 70 mph on the interstate, what is the fraction of your speed compared to the speed of light? A) 6.48 $\times$ 10^-8 B) 1.04 $\times$ 10^-7 C) 2.33 $\times$ 10^-7 D) 3.73 $\times$ 10^-7 E) None of these is correct.

Question

Quizplus · Accepted Answer

According to Einstein's theory of relativity, the maximum speed limit of the universe is the speed of light, which is about 186,282 miles per second. To convert this to miles per hour, we multiply by 3600, which gives us approximately 670,616,629 mph. Therefore, driving at 70 mph on an interstate is only about 0.00001% of the speed of light. To express this as a fraction, we write 70/670616629 and simplify, which gives us approximately 1.04 x 10^-7, or choice B.

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If You Drive at the Posted Speed Limit of 70 $\times$