Question

When burning matchstick is inserted in a glass bottle and boiled egg is kept at the mouth of the bottle. The egg gets inserted in the bottle. give reason
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Answer 1

Answer:

Explanation: The answer is all about air pressure. When you first set the egg on the bottle, the air pressure inside the bottle matched the air pressure outside, so nothing happened. When you dropped the burning paper into the bottle, it caused the air inside to heat up and expand rapidly.