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Air Pressure, Thermal Expansion, and Atmospheric Science

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Multiple Choice

Why do two balloons come closer when we blow in the space between them ?

  1. Greater pressure inside the balloons than the reduced pressure in between them drives the balloons towards one another.
  2. Blowing air in between increases the pressure in between the balloons pulls them closer.
  3. The gravitational force pulls the two balloons closer.
  4. None of the above.
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