Question 1

What is a good marathon pace?

Accepted Answer

Elite: sub-5:00/mi (3:00/km). Boston qualifier: 7:00-8:30/mi. Recreational: 9:00-12:00/mi. 4-hour marathon = 9:09/mi.

Question 2

How do I calculate marathon finish time?

Accepted Answer

Pace (min/mi) × 26.2 = finish time. 9 min/mi × 26.2 = 235.8 min = 3:56. Add 5-10% for fatigue.

Question 3

What's the fastest speed possible?

Accepted Answer

The speed of light (299,792,458 m/s or about 670 million mph) is the universal speed limit. Nothing with mass can reach it.

Question 4

Why do pilots and sailors use knots?

Accepted Answer

One knot = one nautical mile per hour. Nautical miles relate directly to Earth's latitude (1 nm = 1 minute of latitude), simplifying navigation.

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