A van containing pigeons on perches is being weighed on a scale. Something scares the pigeons and they all begin flying around inside the van. Does the total weight of the van and pigeons change?
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March 23rd, 2010 - 14:17
ABSOLUTELY, THE WEIGTH OF VAN WILL DECREASE .
BECAUSE WHEN THE BIRDS FLY ,THERE WEIGHT OR PRESSURE DOESN’T FALLS ON WEIGHING MACHINE.
October 26th, 2009 - 14:39
it will decrease !!!!!!!!!!!!!!