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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?

Please show your math as best as possible.

Admin please delete this as soon as I get an answer.

------------------
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 funkmasterfreaky
02-18-2003 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

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 Message 3 by shilohproject, posted 02-18-2003 9:44 AM Primordial Egg has not yet responded
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shilohproject
Inactive Member


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


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

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John
Inactive Member


Message 4 of 12 (32552)
02-18-2003 10:14 AM
Reply to: Message 3 by shilohproject
02-18-2003 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.

------------------
www.hells-handmaiden.com

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


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funkmasterfreaky
Inactive Member


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

------------------
Saved by an incredible Grace.


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 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 funkmasterfreaky
02-18-2003 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


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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 Percy
02-18-2003 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


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zipzip
Inactive Member


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

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 Message 4 by John, posted 02-18-2003 10:14 AM John has responded

Replies to this message:
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John
Inactive Member


Message 9 of 12 (33424)
02-28-2003 8:57 AM
Reply to: Message 8 by zipzip
02-28-2003 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.

------------------
www.hells-handmaiden.com


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

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zipzip
Inactive Member


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

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 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 zipzip
03-02-2003 3:40 AM


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

http://image.gsfc.nasa.gov/poetry/ask/a11650.html

------------------
www.hells-handmaiden.com


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Replies to this message:
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zipzip
Inactive Member


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


Neat post.

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 Message 11 by John, posted 03-02-2003 10:19 AM John has not yet responded

  
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