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The article explicitly states that the "valve" where you blow the air in stays open. As you said, the paper balloon deforms plastically, meaning it has no back-pressure that would deflate it.

I'm sure that's peanuts compared to what you could get for PF, but PLEASE do not ever sell PF. Years ago, there was what at that time was the best woodworking forum in the English language and it was sold to some seriously greedy folks who SWAMPED it with ads. Most of the better posters on...

The voltage sources are NOT in parallel and BvU's having said that they were was a mistake, which he admits. They happen to ACT as though they were in parallel, in the sense of not doubling to 24V in a final circuit, but they are not actually in parallel. He did not mean to mislead you, but he...

I understand that you covered yourself by saying "effectively", but that is VERY misleading since they are NOT in parallel and telling a beginner that they are is not a good idea, Due to circuit symmetry, they ACT as though they were in parallel which, clearly, is what you meant by "effectively"...

So, they are different (12 vs 24) but they are not different? Seriously?

THANKSGIVING EATING TIPS 1. Avoid carrot sticks. Anyone who puts carrots on a holiday buffet table knows nothing of the Holiday spirit. In fact, if you see carrots, leave immediately. Go next door, where they're serving rum balls. 2. Drink as much eggnog as you can. And quickly, it's rare. You...

And you might also consider that they eject nano-bots that do something like convert flesh to dust and replicate themselves as they do it (but dissolve themselves soon after so they become harmless to others).

What research have you done on this so far? What have you found?

I assume you don't mean JUST for payment but in you mean it isn't used in general, in which case you are completely wrong. The medical profession uses it regularly. For example, doctor's offices fax prescriptions to pharmacies, and there are other medical business uses as well...

Huh? Where do they say that science is at a standstill? I don't see where they say it or even imply it. As for the thrust of the article, do you think that the current methods for funding science do not need any improvement?

Interesting article from the Economist. To me it seems a bit long on vague ideas and short on specifics, but it would be very good to get the right people at least talking about the problems that they point out. The article: They go on to point out that the current system is, to use their...

You are assuming that one of the two frames of reference gives some kind of absolute truth, which is a false assumption. The answer to "how is the motion really described" is "it depends on your frame of reference." Neither one is absolute. All motion is relative.

Well, the vertical motion is proportional to y**2 (for both observers) and the horizontal motion in the reference frame of the pedestrian is proportional to the speed of the train , which is linear. SO ... if it is indeed a parabola (and I haven't checked that but if it's what you read, it's...

Huh. I didn't realize that. I've always heard it called Sag-A-Star but thought I'd use the formal name (incorrectly it seems). Thanks for the correction.

Uh, Sagittarius A is going to be sorry to hear about this change.

You call it a wave, and it is NOT quantized. Light travels as a wave and EM waves are not quantized. Between emission and interaction, there IS no photon and no quantization. The relative velocity of emitter and receiver can cause a wave that starts off at one frequency to be a different...

Well worth keeping in mind, I think:

Right. That's my point. More expenditure (admittedly modest) ever year.

Yeah, but you'd have to not only lay out for the name, you'd have to pay renewal every year.

@DennisN, interesting article. Thanks for posting.

Dave, why would you want to do yet another science site when PF is already the best there is?

@Low Mass Star, that quote is just stringing words together . You would be better off studying some actual physics. For an excellent treatment of the early universe, I recommend "The First Three Minutes" by Weinberg.

@democura, this is a science forum. Your concerns seem to all be philosophical and are not things that can be addressed here. I suggest you join a philosophy forum where you are more likely to get the discussion you seem to want.

@anuttarasammyak this whole business of frame of reference seems to be confusing to some people before they get a handle on it. The terminology can also lead to misunderstanding. For example, when @Nugatory said there is no "in a frame" there is a sense in which he is correct but it's fairly...

No No Uh ... you are WAY low on that estimate. If we COULD do it, which we can't, I think it would take a lot more energy than that. Highly unlikely I seriously doubt we will EVER get there.

Welcome to the forum. I'm an EE and loved it (retired many years ago). I agree with others that your work up to now will not be all that much help, BUT ... your work experience and comfort in a technical field will give you a strong leg up on your way. Good luck.

Exactly. Predicting the next click is what science is all about and all it CAN be about --- creating models that describe reality as best we can and in a way that makes useful predictions. All of the OPs concerns just seem to me like metaphysical/philosophical dead ends.

Actual facts sometimes require a bit of actual THINKING and lots of people don't want to be bothered by that.

We all read/see/hear articles and discussions about how things on the Internet in particular, but even to some extent in "mainstream" media (to say nothing of right wing and left wing publications) can be misleading or just downright false. I was interested to see that, not too surprizingly...

Can we hope to hear from her? EDIT: scratch that. Of COURSE we can wish for it. What I mean is can we expect it?

Gads. I must have been incredibly off in my Googling. Thank you both @CrysPhys and @Vanadium 50 for correcting my carelessness. @MustySponge, sorry about almost misleading you.

Also, it is a MISERABLE place to be in the summers :smile:

Huh. The web site I looked at said undergrad only but I found a different one that says they have a masters degree (in physics). Do you mean that they have PhD program in that they lay the groundwork for future graduate work beyond the masters?

U. of Florida doesn't even HAVE a PhD program in physics, just undergrad. Ga Tech used to be a premier Engineering School (mostly EE, but some others) when I graduated there in the late 60's and it has been working assiduously (and apparently quite successfully) ever since then to diversify...

I'll be damned. I thought this was a photoshop joke, but ...

just a good old fashioned mix…… • So now cocaine is legal in Oregon, but straws aren’t. That must be frustrating. •Dear paranoid people who check behind their shower curtains for murderers. If you do find one, what’s your plan? •The older I get, the more I understand why roosters just scream...

That second one is obviously Casper the Friendly Ghost's retarded uncle :smile: