Didn't realise your question had developed into another about the radius of the Earth.
Eratosthenes noticed that, on mid summer's day, the Sun was directly overhead in Syene. He knew this because the Sun's light got right down to the bottom of a deep well there. But, on the same day, if he was in Alexandria, the Sun was about 7 degrees from the vertical. He reasoned that the Earth must be spherical for this to happen. By measuring the distance between the two towns he was able to estimate the circumference of the Earth. The value he got was amazingly accurate. (note: It isn't just the measurement that is remarkable, but also, that he was able to deduce the shape of the Earth itself!
Bob
]]>Then pardon
no i don't really care about that!some say that there is rebirth.if there is so then we shall wish that our teachers should be swapped!
]]>when i asked the question with my teacher a
few years ago, she just starred at me and the
period ended.
al l of our school teachers are like that.and i just lost interest in asking doubts.i should have been lucky to find you for atleast you are better than my teachers!
]]>Do not get carried away. Everything I used to know about electronics I forgot. It is probably all wrong. You can ban me for that.
]]>Probably the whole thing has been put into a single chip or even a small microprocessor.
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