4 result found with tag "vacuum"

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  Sound

  Chapter 13 of the Science textbook for clas...

  Nov. 23, 2015, 11:57 p.m.
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  Ammonia Fountain (English)

  This is an experiment making process of ammonia...

  Sept. 15, 2016, 10:49 a.m.
• Sound

  Chapter 13 of the Science textbook for class 08

  Oct. 17, 2016, 10:52 a.m.
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  Electric Charge

  Have you ever wondered when we bring comb near ...

  Jan. 24, 2017, 12:45 p.m.