The library of Eratosthenes

France-India-Argentina (February 2011)

Comenius-eTwinning (Elements of Science)-La main à la Pâte (Eratosthenes Experiment)

Sunday 13 February 2011 by perbosc


Comenius-eTwinning (Elements of Science)
La main à la Pâte (Eratosthenes Experiment)

India (Delhi)

RK Govt Sarvodaya Bal Vidyalaya,
Madanpur Khadar,
New Delhi-110076

Latitude = 28.529 or 28 deg 32’
Longitude= 77.291 or 77 deg 17’

Experiment No.1-
Object 1.00 metre and shadow 0.915 metre .
Its calculated angle (Theta) = 42°30’ = 42.5°

India (Meerut)

Meerut, India, NAS Inter College
latitude : 29°00’N
longitude 77°42’E
Length Of Rod= 57.1 cm
angle : 45°
mesures
time shadow
11.00 69.5
11.05 68.2
11.10 67.5
11.15 66.6
11.20 65.5
11.25 64.4
11.30 63.2
11.35 62.1
11.40 61.2
11.45 60.1
11.50 59.2
11.55 58.3
12.00 57.4
12.05 58.6
12.10 59.6
12.15 60.3
12.20 61.4
12.25 62.5
12.30 63.4
12.35 64.5
12.40 65.2
12.45 66.5
12.50 67.6
12.55 68.4
01.00 69.6

.

France (Lafrançaise)


with other european students
Slovenia (Medvode)
Marina di Carrara (Italy)
Valladolid (Spain)
Sibiu (Romania)
Revuca (Slovakia)
Meldrum (Scotland)

latitude 44°08’N = 44.13°
Solar noon : 12:10 UTC
Gnomon : 100cm
Shadow : 160 cm
Angle : 58°

Argentina (Pujato)


Día 11/02/2011
Hora: 11:55
Lugar: PUJATO (Argentina)
Escuela 1345 – Talleres de Ciencia.
Localización Geográfica: -33°01’09"S -61°02’36"W
Gnomon: 32,2 cm
Sombra: 16,9cm
Ángulo = 27,7°=27°42’
Sombra hacia el Sur.

Calculation

New Delhi
Latitude : 28.53°
angle : 42.5°
Lafrançaise
Latitude : 44.13°
angle : 58°

Distance Delhi-Lafrançaise : (44.13-28.53)x111=1732km
Difference between anles : 58-42.5=15.5°
Circumference of the earth : 1732x360/15.5 = 40227km


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