The library of Eratosthenes

september 17

Monday 17 September 2007 by perbosc

Lafrançaise, Stanford

 Lafrançaise

Lafrançaise (FR)
Latitude : 44°08’ N
Shadow :+90,0 cm —>N
Angle : + 42°00’

 Home school, Stanford, Kentucky USA

Stanford (KY USA)
Latitude : 37°32’ N
Shadow :+ 72,0 cm—>N
Angle : + 35°45’

  • We used plastic containers and crushed oyster shell to hold our meter sticks vertical.
  • This is me ready to start measuring. Noon for us was 1:33 pm. The temperature now is 82°F.
  • We had a good time participating in this project. Our weather has turned hot again, we would love some rain. The farmer’s crops and livestock really need it here.

    695.75 km is the approximate distance between Stanford, KY and Lafrançaise, Fance.
    The Circumference of the earth is 360 times the distance between cities divided by the central angle.
    Circ. of earth = 360 X 694.41 / 6 = 41,745 km
    Circumference equals approximately 41,745 km.
    The actual circumference of the earth is 40,076 km.

    September 17, 2007
    Latitude difference : 44°08 ’- 37°32’ = 06°36’= 6.600 °
    Distance : 6600 x 111.1 = 733 km
    Angle difference: 42°00’-35°45’= 06°15’ = 6.250 °
    Circumference: 733 x 360° / 6250° = 42221 km


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