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Enchanted Trinkets Complete--a hardcover book containing over 500 magic items for your D&D games!

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Message: <blockquote data-quote="N'raac" data-source="post: 6222376" data-attributes="member: 6681948">The temperature impacts the density of air - see <a href="http://www.engineeringtoolbox.com/air-density-specific-weight-d_600.html" target="_blank">http://www.engineeringtoolbox.com/air-density-specific-weight-d_600.html</a>.  So even before considering whether we are at sea level (or lower) or high on a mountain peak, which also impacts air density, from the chart, the specific weight of air rises almost 30% if the temperature falls from 30 degrees Celsius to -4 Celsius (both temperatures we tend to see annually around this part of the country).  Air has a weight, and it varies, so if the goal is to apply scientific principals to assess when the bag is overloaded, the weight of air is a scientific principal which can indicate a surprise overload of the bag.Once again, it seems like one possible interpretation. To me, the argument is whether the magic of a bag of holding makes it something other than "an open container".  No official rule answers that question.  We can try to apply science, but now we're applying physics to an item that, by its very definition, defies the laws of physics - that is what magic does.In other words, how we interpret the magic impacts how the question is answered, pretty much what I, and I think some others, have been saying all along.  Can we inflate the spandex bag, or does it exert pressure internally to force the air back out?  If it exerts pressure to force air back out, why can it  not exert pressure to force water back out?  What other substances or contents might the spandex seeking its original form exert pressure to remove from the bag?BTW, the reason the bag in your example inflates is because the air pressure outside exceeds the air pressure inside - heavier air is moving into your bag.  I presume, then, that we will hear no more claims that the weight of air is irrelevant.A nonmagical bag follows the rules of physics.  As I have yet to see a grocery store which uses Shopping Bags of Holding, I cannot scientifically test the premise that a magical bag of holding behaves like an ordinary grocery bag (paper?  plastic?  one of those new lifetime bags?).  Rather, I will have to set a ruling on how that magic works in this game, just as you had to set a ruling on spandex stretchy bag insides.Exactly, on both counts.</blockquote>

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