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Index » Regional/Local » Elsewhere » Science in the News Page: Previous  1, 2, 3, 4, 5, 6, 7, 8, 9, 10  Next
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ScottFromWyoming

ScottFromWyoming Avatar

Location: Powell
Gender: Male


Posted: May 30, 2011 - 7:27am

 oldslabsides wrote:
now wait a minute...

What if this were filmed from above the trombone?  Or from beneath; would the "shockwave" still be in the shape of an arc?  Something about the perspective here just doesn't seem real to me. 
 
The depth of field is so shallow that it essentially is showing you just a cross-section of the half-a-bubble wave. Nearer to or further from the lens is out of focus so it doesn't show up.

Edit: well I was on the right track crack.

Schleiren photography note the link from there to Collimated light

A do-it-yourself guide to Schlieren photography 


NoEnzLefttoSplit

NoEnzLefttoSplit Avatar

Gender: Male


Posted: May 30, 2011 - 6:47am

 oldslabsides wrote:
now wait a minute...

What if this were filmed from above the trombone?  Or from beneath; would the "shockwave" still be in the shape of an arc?  Something about the perspective here just doesn't seem real to me. 

 

i think its because the wave will travel slower as it propagates out to the sides, kind of like waves turning the corner at the beach, presuming you have a beach with corners, that is..
oldviolin

oldviolin Avatar

Location: esse quam videri
Gender: Male


Posted: May 30, 2011 - 6:41am

 oldslabsides wrote:

yes, but the contact lens has an edge in addition to its convex side...

who said anythin' about hatin'? 

 

But I see the edge. Don't you?
just rattling your cage...
Red_Dragon

Red_Dragon Avatar



Posted: May 30, 2011 - 6:36am

 oldviolin wrote:


look at a contact lens from the side...any side, and it's the same. The shock wave is basicallythe same convex shape. maybe...
stop hatin' on peoples horn bones will ya?
 
yes, but the contact lens has an edge in addition to its convex side...

who said anythin' about hatin'? 
beamends

beamends Avatar



Posted: May 30, 2011 - 6:35am

 oldviolin wrote:


look at a contact lens from the side...any side, and it's the same. The shock wave is basicallythe same convex shape. maybe...
stop hatin' on peoples horn bones will ya?


 
or the shock wave from an explosion, wherever you view from it's still dome shaped (in ideal conditions).

oldviolin

oldviolin Avatar

Location: esse quam videri
Gender: Male


Posted: May 30, 2011 - 6:32am

 oldslabsides wrote:
now wait a minute...

What if this were filmed from above the trombone?  Or from beneath; would the "shockwave" still be in the shape of an arc?  Something about the perspective here just doesn't seem real to me. 

 

look at a contact lens from the side...any side, and it's the same. The shock wave is basicallythe same convex shape. maybe...
stop hatin' on peoples horn bones will ya?

Red_Dragon

Red_Dragon Avatar



Posted: May 30, 2011 - 6:19am

now wait a minute...

What if this were filmed from above the trombone?  Or from beneath; would the "shockwave" still be in the shape of an arc?  Something about the perspective here just doesn't seem real to me. 
Red_Dragon

Red_Dragon Avatar



Posted: Jan 26, 2011 - 6:45am

 aflanigan wrote:


Because they are better at grabbing the brass ring on the merry-go-round, of course!



 

Ah, but if we were based on right-handed amino acids would we have built merry-go-rounds that turn the other way?
aflanigan

aflanigan Avatar

Location: At Sea
Gender: Male


Posted: Jan 26, 2011 - 6:39am

 oldslabsides wrote: 

Because they are better at grabbing the brass ring on the merry-go-round, of course!




Red_Dragon

Red_Dragon Avatar



Posted: Jan 26, 2011 - 6:25am

so, why all the right-handed people?
HazzeSwede

HazzeSwede Avatar

Location: Hammerdal
Gender: Male


Posted: Dec 20, 2010 - 6:12am

                      {#Moon}
duchamp

duchamp Avatar

Location: Florida Panhandle
Gender: Female


Posted: Dec 20, 2010 - 6:11am

 HazzeSwede wrote:

{#Yes},,I'm having a funny feeling....
 
 buzz wrote:
The Big Fruitcake has been posting here for years.
{#Lol}....................well, tell him tonight's the night.


HazzeSwede

HazzeSwede Avatar

Location: Hammerdal
Gender: Male


Posted: Dec 20, 2010 - 6:03am

 duchamp wrote:

I hear all the lights go out and the Big Fruitcake arrives.

 
{#Yes},,I'm having a funny feeling....

buzz

buzz Avatar

Location: up the boohai


Posted: Dec 20, 2010 - 6:03am

 duchamp wrote:

I hear all the lights go out and the Big Fruitcake arrives.



 


The Big Fruitcake has been posting here for years.
duchamp

duchamp Avatar

Location: Florida Panhandle
Gender: Female


Posted: Dec 20, 2010 - 6:01am

 HazzeSwede wrote:

I'm gonna stay under my blanket !!{#Yes}..never know's what's gonna happen !? {#Smile}

 
I hear all the lights go out and the Big Fruitcake arrives.


HazzeSwede

HazzeSwede Avatar

Location: Hammerdal
Gender: Male


Posted: Dec 20, 2010 - 5:56am

 hippiechick wrote: 
I'm gonna stay under my blanket !!{#Yes}..never know's what's gonna happen !? {#Smile}
hippiechick

hippiechick Avatar

Location: topsy turvy land
Gender: Female


Posted: Dec 20, 2010 - 5:48am

Lunar Eclipse Tonight: 2010 Winter Solstice To Coincide With Total Full Moon Eclipse On December 20, 21 (PHOTOS)


beamends

beamends Avatar



Posted: Dec 3, 2010 - 8:40am

 winter wrote:

What does the bacterium currently think about life, and how does it anticipate a no-phosphorous diet will change its thinking?



 
Sources say they not very happy about government interference in their diet, but are essentially quite happy with a nice uncomplicated lifestyle. However, now that they have been noticed, they fear for their future, being non-conformists, and have actively started a research programme to investigate moving to a new planet. They acknowledge this presents a few hurdles, but anticipate a few million years of evolution will allow them to achieve their goal. As long as they don't have to listen to too many U2 tracks. Asked if they require any assistance with their plan, they replied that since they'd seen WIkileaks they'd rather get on with it themselves.

winter

winter Avatar

Location: in exile, as always
Gender: Male


Posted: Dec 3, 2010 - 8:29am

 hippiechick wrote: 
What does the bacterium currently think about life, and how does it anticipate a no-phosphorous diet will change its thinking?




musik_knut

musik_knut Avatar

Location: Third Stone From The Sun
Gender: Male


Posted: Dec 2, 2010 - 4:21pm

 Umberdog wrote:
Why does our government keep doing stuff like this?

20 September, 2010
Countercurrents.org

On Wednesday, September 15, the United States Department of Energy conducted a subcritical nuclear explosive experiment under the NNSS (Nevada National Security Site) facility in Nevada formerly known as the Nevada Test Site. The subcritical test dubbed 'Bacchus' is the 24th such controversial 'almost' nuclear test whereby plutonium is bombarded by conventional explosives, short of blowing it up. The first subcritical test was conducted by the U.S. in 1997 and the most recent was 2006. The DOE is expected to give a 48 hour notice to the world community in advance of any full-scale subcritical test but it does not appear that this precedent was followed, and rather was completely disregarded. One Nevada activist group has indicated that they were on a list to get 48-hour notices but never received one. ...

The whole article...  http://www.countercurrents.org/kishner200910.htm

The US is all over everyone else for stuff like this and here they go, setting the example again. I just don't get it.

Another article... http://nuclearhistory.wordpress.com/2010/09/21/usa-conducts-new-sub-critical-test-nevada-sept-20-2010/ 



 

It's called readiness. Same reason a grunt keeps his rifle squeaky clean.
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