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Copy of Copy of History of Measurement

history of measurement

Bob Walters

on 7 February 2013

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Transcript of Copy of Copy of History of Measurement

History of Measurement
Mike Hempel and Bob Walters First measurements 3000-1500 BC Cubit used in Indus
Valley Used in construction
of buildings Inch, Foot, Yard Greeks inherited foot
from Egyptians Early tools The Kersten Blunder Greeks then made the mile or 5000 feet
Queen Elizabeth I changed it to 5280. King Henry I tip of nose to tip of finger is a yard Metric system developed in
1791 in France The Great Kersten Blunder (Kersten was the programer that made the error). The Vigor space probe was sent towards Venus, but because of the computer programing error installed on it had a converting program for millimeters to inches, but it divided by 24.5 instead of 25.4. This error caused it to miss Venus completely and was sent hurling into space. Over 2 billion dollars of technology was lost because of one simple error. The Mars Climate Orbiter had a problem when trajectory programming teams from Europe and USA were working in two different measurement systems , imperial and metric. It missed the planet completely and was lost. Not exactly engineering but it was an aviation blunder. An air Canada flight was fuelled in Toronto using pounds instead of liters of fuel. The pilot calculated how much he needed thinking he was getting his fuel in liters and eventually ran out of fuel near Winnipeg. He successfully landed the plane safely at a semi abandoned WW2 airstrip at Gimli Manitoba. The plow allowed to grow more food than one needed. This allowed for other activities and specialization. Which led to trading the "fruits of one's labor." Myanmar
(formerly Burma),
USA Vigor Space Probe
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