Saturn V noise level at launch

"Ami Silberman" wrote in message
...

What is it with you and Czar Bomba? Is it the answer to everything?

No, but 42 of them would be :-)

Neil Gerace wrote:



What is it with you and Czar Bomba? Is it the answer to everything?



No, but 42 of them would be :-)



42 of them.... IN CUBA!
Hah-ha-ha-ha-ha-ha-ha!

Krushie

Neil Gerace wrote:

That sounds better

If the power figure is an average, then the time it takes for that energy to
be released (Pat would prefer I said 'liberated', I think) is:

energy / power = time

lessee, giga=9, tera=12 ...

240 x 10^15 J / 5.3 x 10^24 W = 45 nanoseconds.



They've got the figure in Wikipedia as 39 nanoseconds:
http://en.wikipedia.org/wiki/Czar_Bomba

"Since 50 Mt is 2.1×1017 joules, the average power produced during the
entire fission-fusion process, lasting around 3.9×10-8 seconds or 39
nanoseconds, was a power of about 5.3×1024 watts or 5.3 yottawatts. This
is equivalent to approximately 1% of the energy output of the Sun during
the same fraction of a second."

So you are both in quite close agreement.

Pat

In article ,
says...
...As a result, no Who concert has ever been OSHA certified. On the
other hand, no OSHA representative reportedly has had the balls over
the years to tell anyone in the band they couldn't play in the States
because of it.

There is at least one case of a rap group roadie who sued the band for
violating OSHA standards. Modern rap concerts can be 120 dB for a couple
of hours. If you are on the board for this night after night, you'll
damage your hearing...
--
Kevin Willoughby lid

What gets measured gets done. -- David Patterson

In article ,
says...
Man-O-War claims to have hit 129.5 decibels in 1994.

Were there any survivors?
--
Kevin Willoughby lid

What gets measured gets done. -- David Patterson

In article .com,
says...
Getting back to the original thread (sort of), I've always liked the
benchmark of 194dB-SPL as the loudest *undistorted* sinusoid at sea
level - complete modulation of atmospheric pressure.

Never heard that one before. References?
--
Kevin Willoughby lid

What gets measured gets done. -- David Patterson

On Fri, 29 Sep 2006 14:33:54 -0500, Pat Flannery
wrote:



Ami Silberman wrote:

What is it with you and Czar Bomba? Is it the answer to everything?
What is the loudest noise? Czar Bomba!
What is the biggest bang? Czar Bomba!
How can we make more tea? Use Czar Bomba to turn lake Aral into world's
largest open air samovar!
Comrade Flannery there are rumors running around that you have the nuclear
hots so bad that you want to be Czarina Bomba.


Comrade A. Silberman, your attitude has been noted! Now stand a little
closer to the vase where the red flowers bloom, so that the wire
recording for your trial will be more clear, as will your treachery!
Czar Bomba IS Communism! Czar Bomba is completely classless in who it
kills, like Khrushchev's shoe descending on roaches and butterflies
alike! Whack, whack, whack! All die now! BOOM, BOOM, BOOM! All fry now!
Is like great iron turd ready to fall on heads of capitalist
miscreants!: http://upload.wikimedia.org/wikipedi...1/Tsarbomb.jpg
Here is film of Commie Cloudbuster in action!:
http://www.youtube.com/watch?v=NiyUSv2Z07A
"Big Ivan" seems to say: "I am purely atheistic - WORSHIP ME!"
Is very basis of dialectics.

Patsky

I just watched the you tube clip and noticed one thing that was
strange. At about the 4min 30sec point of the clip they were showing
what was most likely ground radar screens, the sweep kept jumping on
the screens, it would sweep about two thirds of the screen then go
blank and sweep an opposite two thirds of the screen (best discription
I can give). Was this how Soviet radar was displayed or had some
editing happened?
Seagull

kevin willoughby wrote:
In article .com,
says...
Getting back to the original thread (sort of), I've always liked the
benchmark of 194dB-SPL as the loudest *undistorted* sinusoid at sea
level - complete modulation of atmospheric pressure.

Never heard that one before. References?

It's when the amplitude of the pressure wave is equal to the atmospheric
pressure which means that the total pressure (atmospheric + sound
pressure) varies between 2 atm and 0 atm. Since you can't have negative
total pressure, this is considered to be the loudest (undistorted) sound
possible. See http://en.wikipedia.org/wiki/Decibel#Acoustics.

Tomas

--
Tomas Lundberg | The most exciting phrase to hear in science, the
Ericsson AB | one that heralds new discoveries, is not `Heureka!'
Luleå | but `That's funny...'
Sweden | Isaac Asimov

kevin willoughby wrote:
In article .com,
says...
Getting back to the original thread (sort of), I've always liked the
benchmark of 194dB-SPL as the loudest *undistorted* sinusoid at sea
level - complete modulation of atmospheric pressure.

Never heard that one before. References?

I recall it from a class exercise in the usefulness of the decibel for
describing things logarithmic: the difference between 101kilopascals
and 20 micropascals is only 194 dB.

20*LOG(101,000 / 0.00002) = 194.07 dB

The idea is that the negative peak of the sinusoid is zero atmospheres,
the positive is two atmospheres. Any louder and the atmosphere goes
into clipping on the negative peaks, so there can be "louder" sounds,
but they won't be pure sinusiods. References: Davis & Davis, Sound
Sytem Engineering gives the same quick derivation.

Years later, it strikes me that we should be using the RMS pressure
when talking dB-SPL: 0.707 * 101,000 = 71,407 Pa for a sine.

20*LOG(71,407 / 0.00002) = 191.05 dB

So if you really want to get loud, you pack your stereo into a
hyperbaric chamber . . . . . .

Jake

Seagull wrote:

I just watched the you tube clip and noticed one thing that was
strange. At about the 4min 30sec point of the clip they were showing
what was most likely ground radar screens, the sweep kept jumping on
the screens, it would sweep about two thirds of the screen then go
blank and sweep an opposite two thirds of the screen (best discription
I can give). Was this how Soviet radar was displayed or had some
editing happened?



It's got me baffled also; it could be a radar that scans a wide area to
detect its target, then scans the pie-slice of sky it's in in more
detail to get a finer lock on it. It sure does seem to be hopping all
over the place though.
Another possibility is that the radar is using two antennas- one
determining direction to the target and its range from the station with
a antenna that moves horizontally; the other determining its altitude
and slant range by using a antenna that oscillates up and down, and both
sets of data are being displayed on the screen. Some of their SAM radars
worked like that.
The Soviets did have some strange looking radars, including this one
that can scan two directions at once:
http://images.google.com/images?q=tb...ic/pic9011.jpg

Pat