Does this explain what generates gravity?

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#2,461
To close the loop here on the magic water bowls, the sound is improved because the air near the floor is colder than the air up higher. So what happens is the faster moving acoustic waves up top fall over the slower moving waves down below, like the fast moving crest of a wave crashing over the slower part of the wave down below onto the shore. Thus, more acoustic information is presented to the listener‘s ears. Especially the ambient info which is produced by the mids and tweeters, high up off the floor.
 
#2,462
geoffkait said:
the magic water bowls ... the air near the floor is colder than the air up higher.
Click to expand...

Suppose that sets up a density gradation, high to low, from floor to ceiling, into which the sound waves would fire.

The waves from the speaker would then be moving in a medium of changing refractive index, so would bend in such a way as to be perceived by the listener to emanate from higher up in the room.

This is the same physics as when light waves form a superior mirage as shown in the following illustration, where the ship is analogous to the speaker.

1700263831866.png


Of course, there's no way that three 10" bowls of water ice would be sufficient to produce this effect in a room.

Sadly, my explanation of how the sound waves would travel, whether it be right or wrong, is no more demonstrable than yours.

However, I would say that your words "more acoustic information is presented to the listener‘s ears" are pretty meaningless!
 
#2,468
Really, @geoffkait, and there is no nice way to say this, your scientific credibility in this forum is hanging by a thread!

After this posted video of yours on the previous page.. I mean REALLY? Snowflakes like Bach? 🙄


The comments make interesting reading:

@eckankar7756

@eckankar7756 ​

11 months ago

We duplicated these experiments in a chemistry class and we go vastly different results. We steamed out own distilled water to rule out contaminants. In a month long study we didn't find differences in the water in general. Any water frozen can produce a variety of crystals. We were disappointed that our results were not conclusive of any music, meditations, thoughts produced changes.
Click to expand...

Now Eck***ar are a pretty "out-there" organisation themseves and I will not say their name in full, lest I invoke "evil spirits" to my threshold.

But I can smell Snake Oil when I encounter it.

Snake OIl s7.jpg


https://theconversation.com/how-snake-oil-got-a-bad-name-165574

Though actually, Snake Oil is probably on a par with Cod-liver Oil with vitamin content, of which I approve. But you know what I mean. 🙂
 
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#2,473
Let's get back to science.

Can someone explain why we cannot separate space and time - and here's the strange bit, since they are one and the same - and just consider things from say the time perspective under the assumption that time, like space, is also curved (time passes more slowly in a gravitational field).

What are everyone's thoughts on this?
 
#2,477
Bonsai said:
Can someone explain why we cannot separate space and time - and here's the strange bit, since they are one and the same - and just consider things from say the time perspective under the assumption that time, like space, is also curved (time passes more slowly in a gravitational field).
Click to expand...

Space and time can be seen as components of a single four-dimensional spacetime.

"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" - Hermann Minkowski

Space and time in general relativity are not flat but can be warped by matter. Gravity feels strongest where spacetime is most curved, and it vanishes where spacetime is flat.

Illustrations of the warping of spacetime by a massive object (the rubber sheet analogy) emphasise the spatial curvature while ignoring the temporal curvature.

Looking to the equivalence principle, is the gravitational force we experience on the Earth's surface equivalent to the Earth's surface continuously accelerating outwards? Obviousy not as we don't see the Earth grow larger!

Instead of thinking of the acceleration in spatial terms, we have to think of it in temporal terms. It turns out that nearly all of our weight arises due to the warping of time, rather than space.

What this means in practice is that gravity on earth is "equivalent" to acceleration mostly in the sense that clocks on the surface run more slowly than clocks in outer space.

I claim no ownership of the above information. I simply extracted and edited it from the following source, my knowledge of physics enabling me to make some sense of its contents!

https://einstein.stanford.edu/SPACE...rved, and it vanishes where spacetime is flat.
 
#2,479
I hate to judge too quickly but Galu might need to watch the video I posted from The Time Machine again. Space has four dimensions, three physical and time. LIGO (the project to find gravity waves) developed vibration isolation systems with six (count ‘em) degrees of freedom, so you can add 3 more physical (rotational) directions in some cases. (There are even many more “dimensions“ since one of the six directions is a plane.)

Then there’s the Big Bang number of dimensions in the first microsecond or whatever of expansion. Pop Quiz - does anyone remember how many?
 
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#2,480
Fast Eddie D said:
In classical Newtonian physics, time and space are discrete. For most applications, this is how we all treat it ... At relativistic velocities, it changes.
Click to expand...

Most objects move much slower than the speed of light and will therefore travel much farther in time than in space.

Consequently they are mainly subject to time curvature.

The Newtonian analysis is fine for such objects.

Light, which moves at speed c, will experience equal amounts of space and time curvature.

That's why light bends twice as far as Newtonian physics would predict.

1700334955552.png
 
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