Top network posts

• 103 How are water vapors not visible?
• 67 Why does wet hair keep its shape when it dries?
• 66 Gas pipes - why does gas burn "outwards?"
• 63 Why does pressure in a thermos increase after shaking up hot water and soap?
• 48 Why does a ping pong ball bounce higher when it is dropped together with a cup of water?
• 45 How did my candle wax crawl up the sides of the jar?
• 43 How does defrosting your freezer save energy?
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