An Educational Overview for Americans explains (with plenty of pictures) the basics of the International System of Units. Book Size: A4; 27 pages (31 pages including title page, et cetera). Download your copy today. Available in Portable Document Format (*.pdf). SI An Educational Overview for Americans 2014
Page 3 preview . . . The use of two different systems was the root cause in the loss of the $125 million Mars Climate Orbiter. NASA specified metric units in the contract. NASA and other organizations worked in metric units, but one subcontractor, Lockheed Martin, provided thruster performance data to the team in pound force seconds instead of newton seconds. The spacecraft was intended to orbit Mars at about 150 kilometers altitude, but the incorrect data meant that it probably descended instead to about 57 kilometers, burning up in the thin Martian atmosphere.
Page 13 preview . . . Tardigrades are able to survive in extreme environments that would kill almost any other animal. Some can survive temperatures of close to absolute zero, or 0 Kelvin (-273 °C), temperatures as high as 151 °C, 1,000 times more radiation than other animals, and almost a decade without water. Since 2007, tardigrades have also returned alive from studies in which they have been exposed to the vacuum of space for a few days in low Earth orbit. Tardigrades are the first known animal to survive in space.
Nombres Numbers Números Zahlen Numeri is the multilingual title for a book I wrote for my Granddaughter Willow Eve Pearl. The book spells out numbers in five languages and has an SI column at the end of each section. Book Size: A4; 20 pages. Download your copy today. Available in Portable Document Format (*.pdf). Nombres Numbers Números Zahlen Numeri
Willow can count! is a short book I wrote for my Granddaughter Willow Eve Pearl. The book spells out numbers from one to ten and teaches toddlers how to count. Book Size: A4; 10 pages. Download your copy today. Available in Portable Document Format (*.pdf).
Willow can count! by David Pearl for Granddaughter Willow Pearl
April 2017 CE
1 One Universe
2 Two Eyes
3 Three Branches of Government
4 Four Seasons
5 Five Revolutions
6 Six Great People
7 Seven Wonders of the Ancient World
8 Eight Planets
9 Nine Symphonies
10 Ten Fingers
Become a Metric Pioneer and track your progress with this Progress CheckList (8 pages).