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The Physics Behind Popping Champagne Bottles

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  The Physics Behind Popping Champagne Bottles Sam Wormley <swormley1@gmail.com> - 2015-12-30 15:32 -0600
    Re: The Physics Behind Popping Champagne Bottles jimp@specsol.spam.sux.com - 2015-12-30 23:32 +0000
    Re: The Physics Behind Popping Champagne Bottles Sergio <invalid@invalid.com> - 2015-12-30 19:01 -0600

#542351 — The Physics Behind Popping Champagne Bottles

The Physics Behind Popping Champagne Bottles
> http://www.wired.com/2015/12/the-physics-behind-popping-champagne-bottles/


> Yay! Another trip around the Sun. New Year’s Eve is sort of like the
> birthday celebration for the Earth (or at least according to the
> Gregorian calendar). But it doesn’t just have to be about a party.
> You can also add some physics into your celebration.
>
> How Fast Is a Champagne Cork?
>
> Why does a cork shoot out of a champagne bottle? The first reason
> that cork sails across the room is because you made a mistake. Don’t
> shoot that champagne cork, instead hold your hand over it while you
> open it. Otherwise you could hurt someone—or even worse, spill some
> alcohol.
>
> The second reason is that champagne contains dissolved carbon
> dioxide. This carbon dioxide produces internal pressure that pushes
> on the cork. But here is the cool part. Normally, this internal
> pressure exerts an outward force on the cork that is balanced by a
> frictional force between the cork and the walls of the bottle (and
> maybe a force from the cork net on top of it). However, once the cork
> starts moving it transitions from static friction to kinetic friction
> with a lower value such that the forces are no longer balanced. The
> cork then accelerates and shoots out of the bottle.
>


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#542374

Sam Wormley <swormley1@gmail.com> wrote:
> The Physics Behind Popping Champagne Bottles
>> http://www.wired.com/2015/12/the-physics-behind-popping-champagne-bottles/
> 
> 
>> Yay! Another trip around the Sun. New Year?s Eve is sort of like the
>> birthday celebration for the Earth (or at least according to the
>> Gregorian calendar). But it doesn?t just have to be about a party.
>> You can also add some physics into your celebration.
>>
>> How Fast Is a Champagne Cork?
>>
>> Why does a cork shoot out of a champagne bottle? The first reason
>> that cork sails across the room is because you made a mistake. Don?t
>> shoot that champagne cork, instead hold your hand over it while you
>> open it. Otherwise you could hurt someone?or even worse, spill some
>> alcohol.
>>
>> The second reason is that champagne contains dissolved carbon
>> dioxide. This carbon dioxide produces internal pressure that pushes
>> on the cork. But here is the cool part. Normally, this internal
>> pressure exerts an outward force on the cork that is balanced by a
>> frictional force between the cork and the walls of the bottle (and
>> maybe a force from the cork net on top of it). However, once the cork
>> starts moving it transitions from static friction to kinetic friction
>> with a lower value such that the forces are no longer balanced. The
>> cork then accelerates and shoots out of the bottle.
>>
 
Grade school kids know this.
 

-- 
Jim Pennino

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#542388

On 12/30/2015 3:32 PM, Sam Wormley wrote:
> The Physics Behind Popping Champagne Bottles

>>
>> The second reason is that champagne contains dissolved carbon
>> dioxide. This carbon dioxide produces internal pressure that pushes
>> on the cork.

.....and causes global worming, melting ice and drowning fish !

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