I AM DOING THE FALLING FEATHER WITH MY NEICE, SHE IS IN 4TH GRADE. SO FAR,
I HAVE NOT BEEN ABLE TO DUPLICATE YOUR RESULTS. I HAVE TRIED MY HOUSEHOLD
VACUUM INSTEAD OF THE VACUUM PUMP. I HEAR THE VACUUM PUMP CAN BE QUITE
EXPENSIVE. HOW DO I KNOW WHEN TO INVERT, HOW DO I KNOW WHEN I HAVE ENOUGH
VACUUM IN THE TUBE, DO I LEAVE THE VACUUM RUNNING WHILE I INVERT OR DO I
TURN IT OFF? ANY ASSISTANCE YOU CAN OFFER WOULD BE GREATLY APPRECIATED.
(IS THE VACUUM SUCTION INSIDE THE TUBE REPRESENTING THE CONSTANT 32 FT PER
SECOND SQAURED?) REBECCA CONWAY
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