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Hitch a Ride

Consider these two statistical facts:

[1] For a spacecraft to escape the earth's gravitational effects, the spacecraft must travel faster than seven miles per second.

[2] The crack in a glass, when it breaks, travels faster than 3000 mph.

Question 1: Which speed is faster...the escape speed or the crack in the glass?

Question 2: Traveling at the faster speed, how long would it take you to fly from Seattle to New York?

Source: Uncle John's Supremely Satisfying Bathroom Reader, 2001, p. 52