Answers

2016-01-31T16:44:29+05:30
Fill a 2-liter bottle half full of water.
Take a long straw and insert it in the mouth.
Wrap a lump of clay around the straw to form a seal.
Blow hard into the straw and then stand back.
Your blowing increases the air pressure inside the sealed bottle.
This higher pressure pushes on the water and forces it up and out the straw.
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