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*Yawn* Just Another Water Balloon Popping in Slow Motion

siftbot says...

Tags for this video have been changed from 'slo mo, fluid dynamics, physics, burst, wet, tshirt, bosom, boobs, great, big, gazungas' to 'fluid dynamics, physics, burst, wet, tshirt, bosom, boobs, bewbs, great, big, gazungas' - edited by calvados

Fluids simulation on Multitouch table

Somebody Explain "Wealth" To Me (Politics Talk Post)

imstellar28 says...

NetRunner,

I'm not comfortable stating that the government can create wealth, or its inverse, because like the statement "the government can't create jobs" it leaves too much to interpretation. I would suggest jettisoning these altogether for more precise terms. It is true that governmental employees perform labor when they build roads or provide healthcare, which could be interpreted as the government creating wealth; but I don't think it is a terribly useful hypothesis. Individuals create wealth, and government employees are individuals, so naturally government employees create wealth.

If we look at it from a scientific perspective, the statement:

"labor in the hands of the government creates greater wealth than labor in the hands of individuals"

is a hypothesis which makes a prediction. To test it, we would have to perform a scientific experiment with a control. If the experiment demonstrated that the prediction was accurate, then we would be confident in its claims. What type of experiments could we utilize to do so? I'm not saying it is impossible to test this hypothesis but I think we can agree that it would be exceedingly difficult. There may be many related hypothesis, such as "the central management of resources can increase the efficiency of operation" which is easier to test and may lend credence to its theoretical underpinnings, but I do not think the above hypothesis is testable at the present.

Economics is useful only because the predictions it makes can be used to improve our lives.

As a footnote, I think it is important to state your goal when choosing a hypothesis. If you are measuring the drop of ball, fluid dynamics will not be very useful. I also think it is easy to get carried away with the scope of economics when mixing it with politics. Economics, as much as physics, has no place in politics. When people are talking about building roads, I think the relevant hypothesis is not the above, but rather this:

“the government, through the allocation of funds, can divert resources to specific sectors”

This hypothesis is readily testable and makes very accurate predictions. Because of this, it can be used to improve our lives. For example, if the goal is to create wealth in the form of roads we can use this hypothesis to accurately increase our measure of roads by allocating funds for their creation.

So, to bring it back, in what ways can we use the hypothesis: "labor in the hands of the government creates greater wealth than labor in the hands of individuals" to improve our lives, if such a hypothesis is untested, or even untestable, at the present?

Slow motion strawberry falling into milk

Planets in a Coke Bottle

thesnipe says...

I like this post, but I think as well the explanation of this being any sort of anti-gravity effect is null and void. This is simple fluid dynamics with a bit of the effect we see in a non-newtonian substance sitting on a speaker. It is possible the bottle is filled with a syrup like substance to help promote the effect of fluid shaping caused by a harmonic frequency. I can't explain the full effect of the spheres without consulting my dynamics books but I'm guessing it's a frequency/resonance effect going on here. I would be very skeptic of any anti-gravity/planetary effect here.

Planets in a Coke Bottle

Personal Attacks? (Sift Talk Post)

choggie says...

Thanks for the props, baby. That was intended as always, to deliver the kernel, riding on a cob.

From now on, you will see all ad-hom cease from this appreciative user, unless the hackles are raised to the point, that my ass-showing tendencies, take over.....

Anyone wanna place odds on the date, when choggie will be dragged kicking and screaming, into the principal's office, for abuse......I can assure you, I will do it with more dignity, than some of the folks I have brought, or helped to bring here.....and fedquip, while my sentiments remain steadfast regarding my personal beef, I can say that I appreciate your presence here, in many ways, and am glad you remained. Upon reflection, I would have done it much differently, had I not been so moved, on a visceral level.

Fluid dynamics

CG Physics demo of fire and liquid

HaricotVert says...

Although this is probably *the* best CG-generated physical fluid dynamics available today, there are still noticeable minor artifacts that make it less "real," even though it is definitely convincing.

For example, some of the upward thrusts of the colliding water look too pointed/nonrandom, probably a result of the algorithm used.

I predict in a few more years such artifacts will be gone entirely.

Gravity Wave

silvercord says...

From Wikipedia:

In fluid dynamics, gravity waves are waves generated in a fluid medium or at the interface between two mediums (e.g. the atmosphere or ocean) which has the restoring force of gravity or buoyancy.



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