The card stayed in place beneath the cup of water because the card was held in place by the pressure of the air outside of the cup. This kept the card where it was because the air pressure was greater than the water pressure inside of the cup. Basically, the air pushed the card up more than the water pushed it down.
2 comments:
The card stayed in place beneath the cup of water because the card was held in place by the pressure of the air outside of the cup. This kept the card where it was because the air pressure was greater than the water pressure inside of the cup. Basically, the air pushed the card up more than the water pushed it down.
Great answer! +20
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