swansont

What does any of this have to do with the OP?

But that's both a very blunt instrument and not really correct. A gas cloud that collapses need not have any rotational motion; I don't think that it is mandated by the physics of the big bang, there are a number of intermediate steps from the big bang to the spin of the earth, and even of the big bang were somehow discredited, conservation of angular momentum would still hold. If there is locally any net angular momentum, this must still be present one the cloud has collapsed.

Interesting. I had not previously noticed the WSJ graphs were percentages; at first I thought the data were in conflict with the numbers from rortybomb, but they aren't. Openings rising faster than hires does not mean there are more openings than hires. It's not just filtering the data a certain way, it's presenting it in a way to make it seem that they say one thing, when they don't.

People have already used the accelerometer in the iPhone to do experiments, and there are apps to get the data out. http://scienceblogs.com/dotphysics/2010/04/review_of_some_iphone_accelera.php Someone even launched an iPhone on a homemade rocket http://mobileorchard.com/the-iphone-rocket/ I think the phone will be more useful as a data collection tool, with the sensors as separate devices. In ST:TNG the medical tricorder had a detachable probe. So why not put a temperature sensor somewhere with a wireless transmitter? I think things like that exist (certainly RF transmission of sensor data already exists) and more widespread adoption is imminent; we've been plotting on justifications for ipads in the lab to do this very thing. edit: "Measure data in real time from PASCO's full line of PASPORT sensors with the PASPORT AirLink 2, or use the internal accelerometer" http://itunes.apple.com/us/app/sparkvue/id361907181?mt=8 I imagine more exist

No. Excitation and de-excitation give a discrete spectrum. These e.g. give you lines of emission and absorption on top of the continuous blackbody spectrum of a star.

It is nonsensical to speak generally of simultaneous emission, since simultaneity is frame dependent. One must always refer to the frame in which the events are simultaneous. ! Moderator Note However, this is a thread about solutions to relativity "paradoxes," not your imagined inconsistencies in relativity. Those discussions belong in speculations

12.86 MeV (26.7 MeV for the whole cycle) is the total energy converted from mass to other forms. Some of that will be the gammas, the rest will be kinetic energy of the particles produced in the fusion steps.

Yes, $48.1 billion was in there for it. $27.5 billion for highway and bridge construction projects $8 billion for intercity passenger rail projects and rail congestion grants, with priority for high-speed rail $6.9 billion for new equipment for public transportation projects (Federal Transit Administration) $1.5 billion for national surface transportation discretionary grants $1.3 billion for Amtrak $1.1 billion in grants for airport improvements $750 million for the construction of new public rail transportation systems and other fixed guideway systems. $750 million for the maintenance of existing public transportation systems $200 million for FAA upgrades to air traffic control centers and towers, facilities, and equipment $100 million in grants for improvements to domestic shipyards http://en.wikipedia.org/wiki/American_Recovery_and_Reinvestment_Act_of_2009

You don't need for both parents to have the mutation to pass it along.

! Moderator Note This is also off-topic for this thread

The moving of light source doesn't matter to the observer of the light source measuring the speed of light relative to him. But it matters if he is measuring the speed of light relative to some other frame. Co-location does not imply simultaneity if the co-located points are moving with respect to each other.

! Moderator Note This is off-topic for this thread and also not mainstream physics. If you wish to discuss it, start a thread in the speculations forum

But if you are going to incur debt, now is the time to do it, when debt is cheap. Putting people to work through spending at least has the benefit of removing them from unemployment and gets them paying more in taxes. Each dollar of spending that goes to wages doesn't cost a whole dollar. The total amount of work that needs to be done is much larger than what was in the stimulus bill is why; I don't think the stimulus was sold as curing all of the issues. We have been scrimping on maintenance for decades to help fuel the illusion that low taxes is a viable condition. Preventative maintenance not sexy, so nobody cares too much, until there's a catastrophe. (But then it's a crisis, and we temporarily respond well to crises these days — we ask no questions and are even willing to make some sacrifices) I don't think not hearing about it has any more weight than not hearing about it in the past; it's more "out of sight, out of mind."

Carat is a unit of mass. While the value per carat is variable depending on the specifics, diamonds are indeed sold by weight, and the price (for gem-quality diamonds, at least) is not linear (e.g. a 2 carat diamond is not simply twice the price of a 1 carat diamond)

They both have to agree on what each observer sees, because the solutions are single-valued. This is neither a flaw in nor a violation of any principle of relativity.

As I pointed out a few posts back, compensation for civilian employees comprises only about 7% of the budget (and military pay is about 4.5%). The government buys a lot of products and services. We have almost 150,000 structurally deficient bridges, and most of them are in use. http://slacktivist.typepad.com/slacktivist/2010/08/5-bridges.html The stimulus package included $50 billion of transportation infrastructure. That's $333k per bridge, if money is spent all on bridges, which it isn't. That's puny. The Wilson bridge reconstruction cost $2.5 billion. The repairs on the Tappan Zee is estimated at $6.4 billion I'd hate to be a politician who votes against infrastructure improvement when the next bridge collapses, especially of there is a loss of life involved.

Strength of field is the local value for g, which is GM/r^2. The gravitational potential, which tells you the extent of the dilation, is GM/r. With the proper choices of M and r you can have earth's acceleration, but a larger or smaller amount of time dilation. (e.g. by doubling or halving r and changing M by a factor of 4, you can double or halve the potential with g still at 9.8 m/s^2) Myriad demonstrations of time dilation have been quantitative, so it's much more than saying increasing gravity reddening the source.

An object deeper in a gravitational well will feel more dilation. It's not the strength of the field.

It's circular about the wire. The field direction is given by the right-hand rule: If your thumb points in the direction of the conventional current, your fingers will curl in the direction of the field.

Fusion does not directly produce IR photons. They are produced from the other processes discussed in this thread. What is lacking in these answers that have been given, that you persist in asking the same question over and over?

I agree. What time is (or what energy is or what momentum is) are metaphysical questions. At some level, it's bookkeeping which allows us to quantify what's going on around us. These are the useful parameters since they can be measured and have some use to us. The rotation of the earth doesn't "use" energy, per se, and is used to measure time. It has energy, but then, so does a meter stick. For that to be true one must expect that a charged particle held in a strong electric field would feel time dilation. I don't know of any theoretical framework which would lead to this, nor any experimental evidence to indicate that it's true.

I take it you have not read The Hitchhiker's Guide to the Galaxy

It doesn't begin to move under those conditions. It is already moving. It's called conservation of angular momentum. Entropy does not absorb energy. No. A change in entropy cannot, in and of itself, cause rotational motion. That requires a torque.

The answer has been given to you.

Yup. This was a discussion of the ladder paradox, not your "who is older, A or B" scenario. There was no discussion of clock synchronization or time dilation. I think everyone here realizes that there is no absolute frame in SR.