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Water is heavy. If you drop water on a structure like this, you end up having a collapsed building that is also on fire.
by tomswartz07 7y ago
Water is heavy.
If you drop water on a structure like this, you end up having a collapsed building that is also on fire.
- deleted 7y ago[deleted]
- jimmaswell 7y agoThen why doesn't it collapse when it rains? Edit: Note the absolute phrasing of the parent comment and that the spray force in a strong downpour isn't much less than what's done with firefighting planes in situations that call for that level of pressure.
- _emacsomancer_ 7y agoIt's not usually on fire.
- r00fus 7y agoRain also doesn't put out major fires by itself.
- purerandomness 7y agoBecause most times when it rains, it's also not on fire.
- pfortuny 7y agoBecause. It. Is. Rain.
- noja 7y agoThe rate is different. Lots of water at once versus less spread over a long time.
- CydeWeys 7y agoRain doesn't fall all at once like this: https://www.youtube.com/watch?v=-ZkV64GJihA https://www.youtube.com/watch?v=-ZkV64GJihA
- jimmaswell 7y agoThat doesn't look like any single point gets that much force on it. Wouldn't be surprised if you could safely stand under it.
- keytarsolo 7y agoGive it a shot and report back to us.
- jimmaswell 7y agohttps://www.youtube.com/watch?v=87hfWatbVPY https://www.youtube.com/watch?v=87hfWatbVPY
- holtalanm 7y agoI sincerely hope that was a joke.
- jimmaswell 7y agohttps://www.youtube.com/watch?v=87hfWatbVPY https://www.youtube.com/watch?v=87hfWatbVPY
- tomswartz07 7y agoWater has a mass of ~8.3 lbs per gallon. A DC-10 Air Tanker carries 12,000 US gallons https://en.wikipedia.org/wiki/DC-10_Air_Tanker https://en.wikipedia.org/wiki/DC-10_Air_Tanker All said, that's 45.4 metric tons. Go ahead, stand under one and let us know how it goes.
- jimmaswell 7y agoHere's somebody standing right under one. https://www.youtube.com/watch?v=87hfWatbVPY https://www.youtube.com/watch?v=87hfWatbVPY You people are all being ridiculous today.
- stcredzero 7y agoThe rain falls over an extended period of time, not all at once as one glob. Only several drops are hitting you at any given instant in the rain, so you are only subjected to minuscule amounts of force at any given instant. The difference would be like standing in the shower for 40 minutes, versus being hit my an entire tub full of water going at the same speed all at once. I remember during the Khan Academy controversy a few years back, an educator commented on reddit about the difficulty in teaching some kids about rates. Some kids just don't get rates. They think of speed as something like "a feeling of intensity." They just don't have an abstract, generalized understanding of "N things per unit time." Think about that for a moment. Think about all of the potential for miscommunication.
- jimmaswell 7y agoYes, but the water sprayed from those tankers isn't much more intense than a severe downpour plus wind. The branches aren't snapped off the trees they're sprayed on here and people are standing right inside it: https://www.youtube.com/watch?v=87hfWatbVPY https://www.youtube.com/watch?v=87hfWatbVPY I'm comparing strong rain to water plane spray. Maybe the output of some would be too severe, but clearly some are suitable.
- stcredzero 7y agoI'm comparing strong rain to water plane spray. Maybe the output of some would be too severe, but clearly some are suitable. Got it. I learned something new today.
- mikejb 7y agoBecause it doesn't rain tons of water in less than a second.
- jon-wood 7y agoGenerally when it rains you don’t go from nothing to several tons of water all hitting at once.