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absolute zero
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kenneth mccoy
science forum beginner


Joined: 24 Mar 2005
Posts: 1

PostPosted: Thu Mar 24, 2005 5:41 pm    Post subject: Re: absolute zero Reply with quote

I think 0k is impossible because it would violate Heisenberg's
Uncertainty Principle as the particles would have 100% certain position
and 100% certain momentum (0). What do you think?
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MattN
science forum beginner


Joined: 24 Mar 2005
Posts: 1

PostPosted: Thu Mar 24, 2005 5:41 pm    Post subject: Re: Graduate student opening at the University of California, Irvine Reply with quote

On 1 Feb 2005 02:08:11 -0800, "Demo Hassan" <demohassan@yahoo.com.mx>
wrote:

Quote:
Uncle Al wrote:
Maleki wrote:
On Wed, 26 Jan 2005 18:39:09 -0800, Uncle Al wrote:
Irvine, CA is paradise, folks. ...
- - -
UCI is down the road from my home. Today, 27 January, is sunny with
temps in the low 70s. If you wish to purchase a home here you won't
find anything for less than about $750K. They all come hard-wired
with LANs. No graffiti, no gangs, no crime to speak of, no homeless
bums. Wide streets with bike lanes, green areas everywhere, 300 days
of warm sunshine/year. Schools that output objectively educated
children. South Coast Plaza shopping center wherein any pleasure can
be purchased or at least ordered. Disneyland is up the road in
Anaheim.
Nobody like you, Maleki, lives here. That is our goal - anybody who
cannot pay for the privilege is not tolerated. Oh yeah... Irvine
averages more than one firearm/home. Freedom issues from
intelligence
and education, gainful employment, civic virtue, personal
responsiblity, luxurious chattels; a gun barrel, and a slow steady
squeeze.
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
Schwartz Alan MD
(714) 918-3070
2621 S Bristol St
Santa Ana, CA 92704
http://tinyurl.com/5682x

'Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn'
'In His house at R'lyeh dead Cthulhu waits dreaming'

(followed by more unrelated, obscure links)

I have only one thing to ask:

Whisky, Tango, Foxtrot, over???? Is there a point somewhere in this
morass of drivel?

-Matt
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Nick
science forum Guru


Joined: 08 May 2005
Posts: 795

PostPosted: Thu Mar 24, 2005 5:41 pm    Post subject: Re: The Origin of The Universe / S D Rodrian Reply with quote

Can't start with gravity.
Nothing could expand.

Can't get rid of gravity i.e. Unification/boundaries
So God created matter spread apart.
That way inflation could overcome the gravity.
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Davorak
science forum beginner


Joined: 24 Mar 2005
Posts: 9

PostPosted: Thu Mar 24, 2005 5:41 pm    Post subject: Re: The Origin of The Universe / S D Rodrian Reply with quote

I am sorry there have been no direct measurements of gravity waves only
very good indirect residence.
Article:
http://cgwp.gravity.psu.edu/outreach/ST_oct2000_srcs.pdf
The above article describes how a pulsar-neutron star system matches
GR's prediction of gravity waves very well.

I have also read of how the decaying orbit of a binary neutron star
system matches GR's prediction of gravity waves. The Gravity waves
radiate energy away from the two neutron stars causing they to fall
into one another. While other explanations are possible I have not
heard of one that matches the observed evidence as well as GR's
explaination.
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Don1
science forum Guru


Joined: 28 Apr 2005
Posts: 1859

PostPosted: Thu Mar 24, 2005 5:41 pm    Post subject: Re: Why weight varies and mass not Reply with quote

Don1 wrote:
Quote:
It's all relative PD; depends how you look at it:

It's the RATIO, PD:

snip<

The ratio of any particular body's weight, divided by the rate of the
acceleration at which it will free fall is a constant (w/g), and the
density of any particular substance is the ratio of its weight, divided
by the acceleration at which it will free fall, divided by its volume;
according to the formula for density. Therefore the constant (w/g), for
any given body, divided by its volume - or bulk - is a measure of its
density; not a measure of its mass.

Therefore the body's mass IS equal to it's density MULTIPLIED by its
volume - or bulk.

My appologies for any inconveniences I may have caused. I'm two months
early for April 1st(;^)

So then if the density of a cubic centimeter of water is 1 gram per
cubic centimeter, is it 1000 grams per cubic decimeter? What is it per
cubic meter? I'm not good at counting by tens; always thought metrics -
SI - was off the wall.

Don
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nightbat
science forum Guru Wannabe


Joined: 29 Apr 2005
Posts: 131

PostPosted: Thu Mar 24, 2005 5:41 pm    Post subject: Re: The Origin of The Universe / S D Rodrian Reply with quote

nightbat wrote

Ray Vingnutte wrote:
Quote:

The odds of ufo's are dropping too ;-)

http://www.williamhillmedia.com/index_template.asp?file=2782

nightbat

Why so negative Officer Ray and 2004 is history? The net Darla
aliens have confirmed as soon as 1st Official Contact Day arrives the
present world government Officials will be checkmated. Can you blame
world leaders like his honor Tony Blair or any other government leaders
for not being possibly forthright about the UFO question, for it could
easily undermine their authority and order. The subject has monumental
implications if finally affirmed to the positive.

See: Honorable Tony Blair Gov. site
http://search.netscape.com/ns/boomframe.jsp?query=UK+Prime+Minister&page=1&offset=1&result_url=redir%3Fsrc%3Dwebsearch%26requestId%3Dd8e881798939bc68%26clickedItemRank%3D1%26userQuery%3DUK%2BPrime%2BMinister%26clickedItemURN%3Dhttp%253A%252F%252Fwww.number-10.gov.uk%252Foutput%252FPage1.asp%26invocationType%3D-%26fromPage%3DNSCPTop%26amp%3BampTest%3D1&remove_url=http%3A%2F%2Fwww.number-10.gov.uk%2Foutput%2FPage1.asp

The Commander Pros has select notified us of his Earth planetary landing
so what more proof do you need? Sky Captain nightbat is awaiting secret
Indiana zone pickup to confirm star ship craft race's arrival as first
volunteer Earth human chosen to point head intergalactic critical jump
mission. These are potentially most exciting times gentlefolk's, for
never have so few been so privy to net reported cosmos history in the
making. Yes, humble Earth nightbat has taken the daring step to protect
our and galactic protective Committee chosen Darla from the perils of
intergalactic travel mission. Ok, ok I've got a soft touch for the
better half even alien and don't like to see them get placed in arms
way. I would have most liked my star ship science Officers elect to go
with me but the Commander Pros reports only one is permitted to take the
risk. I do this for the potential advancement of science, benefit to all
mankind, including reported net advanced alien race who has respectfully
granted this opportunity to prove what we're made of.

Ha, ha, ha, if however the Commander Pros is lying about historic
planned nightbat pickup, as most respectful assistant Officer Charles
indicates, then that automatically makes us the better race. For one
amongst the many has proven most honest and worthy then all the not so
forthcoming alien race combined. Should the Commander keep his word and
pickup the Sky Captain nightbat, I will hopefully confirm with their
permission their distinguished presence, and say my fair good-byes to
all including long winded SD Rodrian as I go out and undertake the
daring mission to help protect and serve all. Just hope if and when the
Commander Pros gives the ETA for incoming northern Indiana zone Sil
cleared mini star cruiser flight pick-up that the three secret and ready
to fire 5 minutes apart high burst signal rockets dry chemical fuses
still work. Or then again, the Commander can choose to continue to
costume party boat out at sea and have used this as a net test of our
willingness to honestly communicate in faith towards real 1st Official
Contact Day.

Star race appointed Sky Captain and Senior Elect Liaison Officer out


the nightbat
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Don1
science forum Guru


Joined: 28 Apr 2005
Posts: 1859

PostPosted: Thu Mar 24, 2005 5:41 pm    Post subject: Re: Kinematic motion vs dynamic motion Reply with quote

Steve Ralph wrote:
Quote:
"Don1" <dcshead@charter.net> wrote in message
news:1107261072.675463.150720@f14g2000cwb.googlegroups.com...
Steve Ralph wrote:
"Don1" <dcshead@charter.net> wrote in message
news:1106957106.347518.5900@z14g2000cwz.googlegroups.com...
Studying the history of physics is more interesting and gives
the

story

Theory

SR

So what's the difference?

Example: Lord of the Rings is not a theory.

sr

So Lord of the Rings is not a theory; Then what is it? A motorclycle
club?

Don
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PD
science forum Guru


Joined: 03 May 2005
Posts: 4363

PostPosted: Thu Mar 24, 2005 5:41 pm    Post subject: Re: Why weight varies and mass not Reply with quote

Don1 wrote:
Quote:
Don1 wrote:
It's all relative PD; depends how you look at it:

It's the RATIO, PD:

snip

The ratio of any particular body's weight, divided by the rate of the
acceleration at which it will free fall is a constant (w/g), and the
density of any particular substance is the ratio of its weight,
divided
by the acceleration at which it will free fall, divided by its
volume;
according to the formula for density. Therefore the constant (w/g),
for
any given body, divided by its volume - or bulk - is a measure of its
density; not a measure of its mass.

Therefore the body's mass IS equal to it's density MULTIPLIED by its
volume - or bulk.

My appologies for any inconveniences I may have caused. I'm two
months
early for April 1st(;^)

So then if the density of a cubic centimeter of water is 1 gram per
cubic centimeter, is it 1000 grams per cubic decimeter? What is it
per
cubic meter? I'm not good at counting by tens; always thought metrics
-
SI - was off the wall.

It is 1000 kg/cubic meter, or 1 kg per cubic decimeter, or 1000 g per
cubic decimeter. Thanks for taking the time to work this out for
yourself.

PD

Quote:

Don
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Jeremy Watts
science forum Guru Wannabe


Joined: 24 Mar 2005
Posts: 239

PostPosted: Thu Mar 24, 2005 5:41 pm    Post subject: Re: Why weight varies and mass not Reply with quote

"Don1" <dcshead@charter.net> wrote in message
news:1107340310.480537.263110@f14g2000cwb.googlegroups.com...
Quote:
Don1 wrote:
It's all relative PD; depends how you look at it:

It's the RATIO, PD:

snip

The ratio of any particular body's weight, divided by the rate of the
acceleration at which it will free fall is a constant (w/g), and the
density of any particular substance is the ratio of its weight, divided
by the acceleration at which it will free fall, divided by its volume;
according to the formula for density. Therefore the constant (w/g), for
any given body, divided by its volume - or bulk - is a measure of its
density; not a measure of its mass.

Therefore the body's mass IS equal to it's density MULTIPLIED by its
volume - or bulk.

And if the body is non-homogenous?? What happens then Don? Little in
reality is as simple and linear as you'd like them to be Don...

Quote:

My appologies for any inconveniences I may have caused. I'm two months
early for April 1st(;^)

So then if the density of a cubic centimeter of water is 1 gram per
cubic centimeter, is it 1000 grams per cubic decimeter? What is it per
cubic meter? I'm not good at counting by tens; always thought metrics -
SI - was off the wall.

Don
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Franz Heymann
science forum Guru Wannabe


Joined: 03 Feb 2005
Posts: 282

PostPosted: Thu Mar 24, 2005 5:41 pm    Post subject: Re: Help: I need to understand the Lorentz force Reply with quote

"Androcles" <dummy@dummy.com> wrote in message
news:syTLd.25139$n9.3642@fe3.news.blueyonder.co.uk...
Quote:

"Ken S. Tucker" <dynamics@vianet.on.ca> wrote in message
news:1107295991.663895.41940@o13g2000cwo.googlegroups.com...
Fun thing about this NG, happy memories...
As a brat, my old boy had an electric motor running
on his bench, nothing attached, I touching the
spinning part and burned my finger. So I turn
it off, and touch it again, and it wasn't hot!
Yes, learning physics threw pain....
Ken

My old pop had a heart attack (almost) when he caught me with a
bedside
lamp with the bulb socket unscrewed. It was a British plastic
(bakelite,
then) type, not the American brass variety, and I was watching the
spark
from the built-in switch.
"Look at this, Dad!" 240V, as well, not the American 110V.
I was 11 at the time.
Next came an old cast iron based doorbell and a 6V flashlight
battery.
It wasn't working, but there was an adjusting screw on the contacts.
I
got a pretty powerful jolt while adjusting it, and the next thing
was to
unscrew the bell, attach some wires on each side of the contacts and
put
some brass tubes at the other ends.
After some experiments again, I found the optimum setting of the
contacts.
"Hold these" I said to my sister, and switched on.
That cost me a "Got to your room, NOW!"
Next day I took it to school. Oh, what fun...

And you don't seem to have progressed much beyond that juvenile stage
yet.

Franz
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Double-A
science forum Guru


Joined: 25 Mar 2005
Posts: 342

PostPosted: Thu Mar 24, 2005 5:41 pm    Post subject: Re: The Origin of The Universe / S D Rodrian Reply with quote

nightbat wrote:
Quote:

[snip]

Star race appointed Sky Captain and Senior Elect Liaison Officer out


the nightbat



Glad to hear from you, Officer nightbat.

I was beginning to think you had already ascended.

Yes, lots of work still to accomplish here below in preparation for the
advent of the profound First Official Contact Day. All must be ready.

I look forward to that time when our world leaders will learn their
place in the much grander scheme of things. Even though our
extraterrestrial friends have no intentions of ruling, I'm sure our
leaders will be much more circumspect in their actions once they know
that another world is watching.

Well, nightbat, Sky Cap you say. Then at least I'll know my baggage
will be in good hands!


Double-A
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Don1
science forum Guru


Joined: 28 Apr 2005
Posts: 1859

PostPosted: Thu Mar 24, 2005 5:41 pm    Post subject: Re: What's the relationship between density and bulk? Reply with quote

Ha-ha; aren't they related in that for a particular body of matter,
their product is the quantity of the matter contained in that body?
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Don1
science forum Guru


Joined: 28 Apr 2005
Posts: 1859

PostPosted: Thu Mar 24, 2005 5:41 pm    Post subject: Re: What's the relationship between density and bulk? Reply with quote

Yes; a rotating merry-go-round will indeed cause riders to be thrown
outward.
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PD
science forum Guru


Joined: 03 May 2005
Posts: 4363

PostPosted: Thu Mar 24, 2005 5:41 pm    Post subject: Re: What's the relationship between density and bulk? Reply with quote

Don1 wrote:
Quote:
Yes; a rotating merry-go-round will indeed cause riders to be thrown
outward.

I see. And you have no doubt heard of this being called "centrifugal
force".
Tell me, what is the agent that causes centrifugal force? I can account
for gravity (the earth) acting on a rider, friction from the
merry-go-round's surface acting on a rider, the normal force due to the
merry-go-round's surface acting on a rider.... What is the agent that
is pushing or pulling outward?

PD
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PD
science forum Guru


Joined: 03 May 2005
Posts: 4363

PostPosted: Thu Mar 24, 2005 5:41 pm    Post subject: Re: What's the relationship between density and bulk? Reply with quote

o<eth>in wrote:
Quote:
Hmm. Let's see. Density has units mass/length^3. Bulk has units
length^3. In order to get a quantity with units mass only, do I
divide
or multiply? Be careful here, Don. If you can't get this right, I'm
not
going to bother explaining anything else to you.

If he gets this wrong, I really will have to make that long avoided
decision
to put poor old Don into my killfile. I would hate to do that, but if
he
gets this one wrong, I really have no choice left. I hope he makes
the right
choice here!

FWIW, in another thread, Don has acknowledge that the answer is
"multiply".

PD
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