Helium balon sonda

[Snail Instruments]

>Je to typicky pripad kedy treba presne pocitat blizke pole a nesmie 
>sa aproximovat bodovym zdrojom.

http://en.wikipedia.org/wiki/Gravity_of_Earth

Veticka v druhe tretine clanku:
"Note that this formula only works because of the mathematical fact 
that the gravity of a uniform spherical body, as measured on or above 
its surface, is the same as if all its mass were concentrated at a 
point at its centre. This is what allows us to use the Earth's radius for r."

Rekneme, ze z matematickeho hlediska jsme meli vic stesti nez rozumu :-)

J. Hanzal