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# Math problem for anyone who loves math

Author Topic:   Math problem for anyone who loves math
funkmasterfreaky
Inactive Member

 Message 1 of 12 (32528) 02-18-2003 4:49 AM

How long would it take to travel 16 000 light years at the speed of sound?

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Saved by an incredible Grace.

[This message has been edited by funkmasterfreaky, 02-18-2003]

 Replies to this message: Message 2 by Primordial Egg, posted 02-18-2003 5:12 AM funkmasterfreaky has responded

Primordial Egg
Inactive Member

 Message 2 of 12 (32531) 02-18-2003 5:12 AM Reply to: Message 1 by funkmasterfreaky02-18-2003 4:49 AM

Hi Funkster,

Well, very approximately...

speed of sound = 330 m/s
speed of light = 300,000,000 m/s

so...

time it takes to go 16,000 ly at the speed of sound:

= 300,000,000*16,000/330

= 14.5*10^9 years (14.5 billion years) i.e more than the age of the universe (especially so if you're a YEC)

Why would you want to know this though, if you don't mind me asking? It seems like a bit of a pointless question.

PE

 This message is a reply to: Message 1 by funkmasterfreaky, posted 02-18-2003 4:49 AM funkmasterfreaky has responded

 Replies to this message: Message 3 by shilohproject, posted 02-18-2003 9:44 AM Primordial Egg has not yet responded Message 5 by funkmasterfreaky, posted 02-18-2003 4:25 PM Primordial Egg has not yet responded

shilohproject
Inactive Member

 Message 3 of 12 (32548) 02-18-2003 9:44 AM Reply to: Message 2 by Primordial Egg02-18-2003 5:12 AM

Is this the speed of sound in space, at sea level, under water...?

 This message is a reply to: Message 2 by Primordial Egg, posted 02-18-2003 5:12 AM Primordial Egg has not yet responded

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John
Inactive Member

 Message 4 of 12 (32552) 02-18-2003 10:14 AM Reply to: Message 3 by shilohproject02-18-2003 9:44 AM

Sea level, give or take. The speed of sound varies with density.

There is no sound in space-- yes, Hollywood has lied to you -- and hence no speed of sound in space, btw.

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www.hells-handmaiden.com

[This message has been edited by John, 02-18-2003]

 This message is a reply to: Message 3 by shilohproject, posted 02-18-2003 9:44 AM shilohproject has not yet responded

 Replies to this message: Message 8 by zipzip, posted 02-28-2003 5:08 AM John has responded

funkmasterfreaky
Inactive Member

 Message 5 of 12 (32591) 02-18-2003 4:25 PM Reply to: Message 2 by Primordial Egg02-18-2003 5:12 AM

Thanx, It seemed a pointless question to me too. My brother asked me and I'm not sure why he wanted to know.

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Saved by an incredible Grace.

 This message is a reply to: Message 2 by Primordial Egg, posted 02-18-2003 5:12 AM Primordial Egg has not yet responded

 Replies to this message: Message 6 by Percy, posted 02-18-2003 4:50 PM funkmasterfreaky has not yet responded

Percy
Member
Posts: 19801
From: New Hampshire
Joined: 12-23-2000
Member Rating: 2.4

 Message 6 of 12 (32593) 02-18-2003 4:50 PM Reply to: Message 5 by funkmasterfreaky02-18-2003 4:25 PM

Curious that the answer is pretty much the current estimate for the age of the universe. Seems like that 16,000 light-year figure was pretty specially selected. Yikes, shades of intelligent design!

--Percy

 This message is a reply to: Message 5 by funkmasterfreaky, posted 02-18-2003 4:25 PM funkmasterfreaky has not yet responded

 Replies to this message: Message 7 by Peter, posted 02-27-2003 4:09 AM Percy has not yet responded

Peter
Member
Posts: 2161
From: Cambridgeshire, UK.
Joined: 02-05-2002

 Message 7 of 12 (33341) 02-27-2003 4:09 AM Reply to: Message 6 by Percy02-18-2003 4:50 PM

Perhaps they wanted to know when we would hear the
big bang.

Shame that in space no-one can hear you scream

 This message is a reply to: Message 6 by Percy, posted 02-18-2003 4:50 PM Percy has not yet responded

zipzip
Inactive Member

 Message 8 of 12 (33412) 02-28-2003 5:08 AM Reply to: Message 4 by John02-18-2003 10:14 AM

Well...there is no audible sound in space. But there is no perfect vacuum anywhere (a few hydrogen/helium atoms here and there). So for extremely large-scale, high-amplitude displacements there should be some (extremely low frequency) sound, sort of. And if you had an enormous ear and a lot of patience perhaps you could hear it.

 This message is a reply to: Message 4 by John, posted 02-18-2003 10:14 AM John has responded

 Replies to this message: Message 9 by John, posted 02-28-2003 8:57 AM zipzip has responded

John
Inactive Member

 Message 9 of 12 (33424) 02-28-2003 8:57 AM Reply to: Message 8 by zipzip02-28-2003 5:08 AM

I don't think so. If atoms are too far apart they aren't going to form a wave, there isn't going to be a sound.

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www.hells-handmaiden.com

 This message is a reply to: Message 8 by zipzip, posted 02-28-2003 5:08 AM zipzip has responded

 Replies to this message: Message 10 by zipzip, posted 03-02-2003 3:40 AM John has responded

zipzip
Inactive Member

 Message 10 of 12 (33499) 03-02-2003 3:40 AM Reply to: Message 9 by John02-28-2003 8:57 AM

That is the point of extremely large-scale displacements of the medium -- so that the degree of rarefaction and compression are such that wave propagation occurs.

 This message is a reply to: Message 9 by John, posted 02-28-2003 8:57 AM John has responded

 Replies to this message: Message 11 by John, posted 03-02-2003 10:19 AM zipzip has responded

John
Inactive Member

 Message 11 of 12 (33502) 03-02-2003 10:19 AM Reply to: Message 10 by zipzip03-02-2003 3:40 AM

Well... I found a good source supporting your view, so I must concede.

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www.hells-handmaiden.com

 This message is a reply to: Message 10 by zipzip, posted 03-02-2003 3:40 AM zipzip has responded

 Replies to this message: Message 12 by zipzip, posted 03-04-2003 8:50 PM John has not yet responded

zipzip
Inactive Member

 Message 12 of 12 (33665) 03-04-2003 8:50 PM Reply to: Message 11 by John03-02-2003 10:19 AM

Neat post.

 This message is a reply to: Message 11 by John, posted 03-02-2003 10:19 AM John has not yet responded

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