SPEED OF SOUND

Some speed reading:

760.98---- Speed of sound, in miles per hour, at sea level.

659.78---- Speed of sound, miles per hour, in the stratosphere. (Air is colder)

186,282– Speed of light, in miles per second.

Highest reliable measured speed.

World’s creatures. (In miles per hour)

• Spine-tailed swift-----106.25
• Cheetah----------------- 70.
• Sailfish------------------ 60
• Human being----------- 27
• Human being swimming– 5.19

World’s record time, in seconds, for a human being running 100 meters–9.85.
World’s record time, in minutes and seconds for a spider 100 meters-8.50.
World’s record time, in hours and minutes for a snail 100 meters-2.4.

Maximum speed, miles per hour, reached by American parachutist, free fall from 90,000 feet Dropped from a balloon 625.2

Orbital velocity, miles per hour; of the following:

• Pluto-----10,604
• Earth-----66,641
• Mercury-107,132

Electron in a uranium atom—5,402,700 m.p.h.

Rotational velocity, miles per hour, of the following:

• Venus-----4,05
• Earth-------1.040
• Jupiter------28,325

Apollo 10 - Command module in 1969 - 24,791 - m.p.h
Pioneer 10 - 1st man-made craft to leave the solar system - 32,114 m.p.h.
Helios B - 1976 Solar probe - 149,125 - m.p.h.
(Cruising speed - Concorde - 1,450 miles per hour)

Water:

• Average speed: Mississippi River - 2 miles per hour.
• Average speed Gulf stream - - - - 4.6 to 5.8 miles per hour
• Average speed , typical tsunami - - 490 miles per hour
• (Cruising speed - United States ,ocean liner, - 41 miles per hour.

Sources:
“Comparisons” by: The Diagram Group
St. Martin’s Press, 1980

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