Clessidra

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From: <nexus0_at_geocities.com>
Date: 1998/05/23

Da giorni un problema di fisica mi perseguita ...
Una clessidra pesa di pi� quando la sabbia � raccolta sul fondo o
mentre la sabbia sta cadendo ?

Grazie.

nexus0_at_geocities.com
Received on Sat May 23 1998 - 00:00:00 CEST

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