please help me understand better by giving a independent
definition of time or any resource for that.thanks in advance.
If you are a graduate student--do a bit of self education. Learn
how to research in a library or on the internet.
Everything has a rate.
This soft bound book presents a clear on understanding with a minimum of
mathematics being at a high school level.
"thaif" <m.t...@gmail.com> wrote in message
news:06dd7c55-8635-416c...@13g2000prl.googlegroups.com...
"Sandcastle" <in...@vipilot.com> wrote in message
news:h5jmk4$191p$1...@adenine.netfront.net...
It's not as easy as that since time is a fundamental quantity and as such it
can't be defined in terms of more basic concepts. At most one can give an
operational definition (e.g. time is what you measure with a clock) or an
idea of what it pertains to (e.g. time relations to changes in nature).
That's like suggesting that no graduate student should post a question here.
Not very good advice, Sam. If he's a grad student then he knows how to do
research and has a reason for posting that question in this newsgroup.
Pete--I'll let you answer the lad's question. Go ahead.
-Sam
How do you "take pictures" faster than a strobe light?
I can build a "pulse fusion machine"
How do you build a "pulse fusion machine"?
I can
> make my house green,and save big energy bills/ I can start small gas
> engines without pulling on their rope.
How do you start small gas engines without pulling a rope?
I can mow fertilized,and kill
> fire ants all at the same time.
How do you kill fire ants?
I am working on a wind turbine that can
> triple the strength of the wind force.
How can you change the wind force?
I love to think of making stuff
> better, I even cool by using the photons of the Sun.
How do you cool using the photons from the sun?
I am clever
> TreBert
>
Well, even though this sounds like a plausible approach, you'll find
out soon enough that it's not adequate.
For example, physicists already know that this time parameter is not
universal and changes for different reference frames, both in flat
spacetime and curved. The effects of this can be quite surprising,
including reversing the sequence of two events! (In your picture, if
event A precedes event B in one frame, then it would precede it in
all. Not so in reality!)
I don't think there really is a good answer for what time is.
PD
Time is what an honest clock measures. If you do not like
oscillators, then radioactive decay half-life. Clocks can only be
synchronized by being local (touching). The next generation of atmomc
clocks will be senstive to elevation differences of a meter or less
within the Earth's gravity vs. the geoid.
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/lajos.htm#a2
Just because I said that it's not good advice to tell grad students not to
post questions it doesn't mean that I personally want to answer the question
they ask. It may not interest me. In this particular case I did respond
though.
Pete
Not to mention modest
I have the original image you set me... to compare to any new image
you sent.
My fusion machine is "BIG" and rather
> simple. It works much like a H-Bomb only its explosions are in great
> control for size. What destroys the machine like the Tokamak my machine
> is made to overcome.
Right!
Timing is every thing,and here is a kicker for you
> Sam "It makes good use of my method to take fast pictures,and there is a
> time laps before motion starts. You see its all based on good thinking.
Right!
Are you sure you don't me Minkowski?
You can't "know" something if its untrue bert. Space is what we call
dimension. Time fills its volume.
Mitch Raemsch
You couldn't think your way out of a shadow.
But not in physics.
Time is a familiar stranger, Herb.
-------------------
Time is nothing but
motion comparison
to some*** chosen** motion reference
it is not natures invention
it is a human invention
though]
a very useful one
btw
whil i was your age or even younger
i made the folowing though texpariment:
suppose that all motion in univers
stops while some chosen by you
motion stops mooving
pleae note agaim
ie compplete stop
even the electrons in your body stop
photons stop on trheir way
etc etc
all motion1!
and that stop takes one billion years
and then
your chosen reference stars to move
together with all motion in the univers (from thjepoint it was before
the general stop
now comes the punch question::
will you notice that stop
of one billion years !!???
so may be that will tell you
something about what is time
hope it is some help
ATB
Y.Porat
----------------------------
Virtual?
When you just think alone--without the benefit of library books
or academic resources, it is VERY EASY to think you are making
progress, when in fact you are not.
If you can not work the physics problems in physics textbooks,
you don't understand the physics... it is that simple.
When you had a good time answering the mysteries of the universe
without the benefit of library books or academic resources, it is
VERY EASY to think you are making progress, when in fact you are
not.
I don't want to take from your old brain, the satisfaction of thinking
you know physics, but when you pontificate falsely...
Do you mean Minkowski?
But you can have empty space-time.
I believe that space as volume was created first then time an energy
in it.
Singularity was space not mass.
Mitch Raemsch
Time is Allah's way of guaranteeing that
everything doesn't happen all at once.
--
Rich
Uncle Al made a good point!
You spew bad physics on a physics newsgroup, you will
get reactions from a few of us that take the time to
point out your idiocy, Herb.
Actually I, on many occasions, have tried to point you
in a better direction, but you never take the advice.
Ref: http://en.wikipedia.org/wiki/Hermann_Minkowski
"By 1907 Minkowski realized that the special theory of relativity, introduced by Einstein
in 1905 and based on previous work of Lorentz and Poincaré, could be best understood in a
four dimensional space, since known as "Minkowski spacetime", in which the time and space
are not separated entities but intermingled in a four dimensional space-time, and in which
the Lorentz geometry of special relativity can be nicely represented. The beginning part
of his address delivered at the 80th Assembly of German Natural Scientists and Physicians
(September 21, 1908) is now famous:
"The views of space and time which I wish to lay before you
have sprung from the soil of experimental physics, and therein
lies their strength. They are radical. Henceforth space by
itself, and time by itself, are doomed to fade away into mere
shadows, and only a kind of union of the two will preserve an
independent reality".
The scientific evidence (from more than one source) puts the
age of the universe between 13 and 14 billion years in age.
Herb just pulls some number out of his... without any scientific
evidence whatsoever.
Why don't we measure the virtual EM spectrum?
Why can't we see a virtual photon?
Mitch Raemsch
I don't bash you, Herb. But when you spew crap contradicted by
scientific observation, I might (if you are lucky) let you know
about it.
Pick any of your postings.
Minkowski is give credit to first unifying space and time.
Nope--The age of the universe is inferred from the expansion rate
and other observational data.
The imperial thinkers do not know when the first star in the
> Milky Way formed. Do not know when the first neutron formed of how long
> it took to form.
Adapted from Baez, "This Week's Finds in Mathematical Physics:196", UCR (2003)
http://math.ucr.edu/home/baez/week196.html
In conclusion--it is just fascinating that we can piece together
a reasonably accurate picture of the history of the Universe.
We only "know" anything about the world on the basis of various
assumptions. If our assumptions turn out to be wrong, our
"knowledge" may turn out to be wrong too. Even worse, our
favorite concepts may turn out to be meaningless, or meaningful
only under some restrictions.
So, when we talk about what happened, say, in the first
microsecond after the Big Bang, we're not claiming absolute
certainty. Instead, we're using various widely accepted
assumptions about physics to guess what happened. Given these
assumptions, the concept of "the first microsecond after the Big
Bang" makes perfect sense. But if these assumptions are wrong,
the whole question could dissolve into meaninglessness. That's
just a risk we have to run.
What are these assumptions, exactly? They include:
1. Einstein's GTR
2. the Standard Model of particle physics
supplemented by
3. some form form are dark energy, in other words a nonzero
cosmological constant, lambda, the same lambda that Albert
Einstein inserted in his equation and later considered it to be
his biggest blunder. If Einstein were alive today, he would have
been thrilled to find that his cosmological constant appears to
be a necessary ingredient in the way the universe works. And
Einstein's biggest blunder has instantly become the greatest
mystery in science.
4. some form of "cold dark matter", unseen matter whose
gravitational effects are observed in the motions galaxies and
clusters of galaxies.
Assumptions 3 and 4 are the ones most people like to worry
about, because our only evidence for them comes from cosmological
observations, and if they're true, they probably require some
sort of modification of the Standard Model. But if we don't make
these assumptions, our model of cosmology just doesn't work...
while if we *do*, it seems to work quite well as is shown with
the WMAP data!
Many in this USENET newsgroup have called me a lot worse, Herb.
Most of your ideas, Herb, are nothing but crap. That's OK, you
are one of the more notable crap crappers.
That must be why you like me, Herb. I call you on your bullshit.