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Unformatted text preview: least for the air inside the tire to cool off to get an accurate tire pressure reading.) Let's continue with the hot air balloon example to make another important point. Once the balloon fabric is all puffed up, raising the temperature further inside the balloon will cause the air inside to flow out of the hole in the bottom of the balloon and density inside will drop. At the same pressure, less dense things will float upward ( Archimedes' principle )---the hot air balloon will rise up off the ground. At a given pressure, cooler air is more dense than hotter air so the cooler air will sink. In an atmosphere, rising warmer air and sinking cooler air can transfer heat energy from a hotter surface to a cooler upper layer of the atmosphere in a process called convection that will be covered in more detail later....
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- Fall '10
- Astronomy, Hot air balloon