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                                    A small paper ball is kept in the neck of a glass bottle held horizontally. Explain, why, it is difficult to force the paper ball into the bottle by blowing air into the bottle | 
                            
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Answer»  A small paper ball is kept in the neck of a glass bottle held horizontally. Explain, why, it is difficult to force the paper ball into the bottle by blowing air into the bottle  | 
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