First, pour hot water into the cup. Be careful when handling hot water!
Wait for a few seconds. Bring the lip of the cup to the balloon.
Next, pour cold water on the glass and look what happens. Check out this video!
How did that happen?
It's all because of science! And again it is ‘air pressure’.
When hot water was poured into the glass, the air inside it warmed up. And after cold water was poured onto the glass, the air inside it contracts creating low pressure. So the higher pressure in the balloon pushes it into the glass.
Note: Children must have adult supervision if trying this at home.
Note: Children must have adult supervision if trying this at home.
Posted by Ayu Royani
Petrosains Blogger
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