09-25-2008, 02:58 PM
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Join Date: Dec 2007
Location: Cincinnati
Posts: 120
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The Physics of Jars and Butterflys
So I have a sealed jar with a butterfly inside.
1. Is the jar heavier with the butterfly sitting on the bottom or side? OR 2. Is the jar heavier with the butterfly flying around inside the jar? OR 3. Its always the same weight regardless if the butterfly is sitting or flying Discuss... I was told I can ask for outside help on this homework project so do it well since I get a grade on this  Thanks! AARON
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09-25-2008, 03:18 PM
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Poor Bastard
Join Date: Jan 2007
Location: Lynchburg, OH
Posts: 189
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[QUOTE=MrShoeBoy;18080]So I have a sealed jar with a butterfly inside.
1. Is the jar heavier with the butterfly sitting on the bottom or side? this one OR 2. Is the jar heavier with the butterfly flying around inside the jar? the weight is not measurable OR 3. Its always the same weight regardless if the butterfly is sitting or flying. the mass is always the same but not the weight i'm guessing but it makes sense to me
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if you can't fit it....FORCE IT!!!!!!!!! |
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09-25-2008, 03:40 PM
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Join Date: Feb 2007
Posts: 147
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Substitute jar full of water with a fish inside and it will be more apparent. Of course, if you are just asking about the jar as opposed to the jar, butterfly and air, answer is teh same, reason is different.
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Unimog 406 XJ with a bunch of stuff put on by somebody else Last edited by wilson1010; 09-25-2008 at 03:58 PM. |
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09-25-2008, 04:12 PM
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EX-Vice President
Join Date: Jan 2007
Location: Fairfield, Ohio
Posts: 3,048
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Weight is the same flying or not. When the butterfly is flying the wind pressure exurted from the flapping wings will be the same as the weight displaced from the butterfly sitting on the bottom. Mythbusters on the discovery channel just covered this I believe with pigeons in a semi trailer. Now go finish your homework.
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09-25-2008, 04:34 PM
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Poor Bastard
Join Date: Jan 2007
Location: Lynchburg, OH
Posts: 189
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never thought about the pressure from the flapping wings. you guys are right... i guess wisdom does come with age!
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09-25-2008, 05:10 PM
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The Pirate
Join Date: Oct 2007
Location: Lebanon, Oh.
Posts: 297
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09-25-2008, 05:15 PM
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EX-Vice President
Join Date: Jan 2007
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09-26-2008, 05:54 PM
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Cleaning off the rust...
Join Date: Jan 2007
Location: Cincinnati, OH
Posts: 1,009
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<Sigh>, I miss Scottie...
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brad  5.0L | 435 | 203 | 300 | 4.10 | 39.5 Buildup BACK underway... 
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09-26-2008, 09:33 PM
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Join Date: Dec 2007
Location: Cincinnati
Posts: 120
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Quote:
Thanks for the replies guys! I was thinking it would be the same since the amount of air displaced inside the jar was the same regardless if it was flying or sitting dead on the bottom. Just had to double check with all you old wise guys on here  AARON
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