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Hold Up A Glass Of Water. How Heavy Do You Think ...
Contributed by Sherry Proskine on Nov 21, 2007 (message contributor)
Hold up a glass of water. How heavy do you think this glass is? The total weight isn’t so important, it’s how long you try to hold it. If I hold it for a minute--not a problem. An hour--my arm will ache. Hold it for a day--you better call an ambulance.