swansont

Which is why saying that "X has written N books on the topic of Y" gives a false sense of authority and expertise about X. Anybody, in principle, can write a book.

The H-K experiment? Planes with a cesium clocks travelled westward and eastward for a number of hours, and a clock stayed on the ground. From the point of view of an inertial observer (not on the earth), the plane that moved west was travelling the slowest, and its clock sped up relative to the ground-based clock. The eastbound clock was going fastest, and it slowed down relative to the ground-based clock. There was also a change in the gravitational redshift, because the planes flew at some altitude, and clock rates depend on your gravitational potential too. The overall effect was consistent with the predictions made by relativity.

Gammas are photons released in nuclear reactions. The bulk of the energy released in fission is in the kinetic energy of the fission products. Some energy will be released later on in the decay of the fisiion products, which tend to be beta decays. A small fraction of the energy released is in the gammas and neutrons. There really aren't an appreciable number of alpha particles involved in the reactions.

For a dryer. But the discussion is about washing machines, so the spin axis is perpendicular to the surface of the earth. Gravity is irrelevant to the discussion.

According to Dirac theory electrons are point particles, and all of the physical evidence is consistent with that.

Note that magnetic forces do no work (the force is perpendicular to velocity), and so cannot be directly used to change the kinetic energy of an object. If you want to use antigravity, you'll have to discover it first. And it had better not violate the laws of thermodynamics! (i.e. you can't turn it on and off)

Also the Bremsstrahlung X-rays you get from the electrons hitting the screen, which are probably the more important source.

Magnetic forces do no work - the force is always perpendicular to the velocity vector. Thus, they cannot alone be used for propulsion.

I think he's referring to the radioactive boy scout though the article mentions radiation 5 doors away, not 5 blocks.

Assuming I did my calculations correctly, you get about 27.5 mW/g from Ra-226. Make sure that turbine is small and well-lubricated.

I'd guess that the alphas are ionizing or at least exciting the electrons above their metastable state, which means the material can't fluoresce the way it usually does.

BA in physics. MS and PhD in atomic physics.

Alphas deposit a lot of energy in a short distance. Most likely they are destroying whatever molecules that are in the sticker, rather than just exciting an electron like is supposed to happen.

"All science is either physics or stamp collecting" (or something close) is a quote from Ernest Rutherford. If you disagree, take it up with him.

The HLA gene in humans has 59 alleles - that is, 59 different versions of this one gene. The minimum population that can contain 59 alleles is 30. How could Noah and his family have possessed all of those variants? There are many example of multiple alleles in other animals, which is even more problematic if you have just a mating pair, rather than a family. It is often argued by creationists that mutations are always harmful. How does one explain this discrepancy?

11' tall - citation? The current trend of getting taller is about good nutrition. The moon is currenty receding at about 4 cm a year. To assume that it's doing so in a linear fashion is folly. But, at that rate, it would have been 40,000 km closer a billion years ago. But since the current configuration of continents and oceans gives really efficient tidal coupling, the rate at which we transferred angular momentum to the moon would have been smaller in the past. Interesting, yes; but not, I think, for the reasons you imply.

No, U-238 has a half life of about 4.5 billion years. The half life of U-235 is about 700 million years.

UF6 is a gas (under the right conditions) It's formed so that one can use gas membrane diffusion or gas centrifuge for the enrichment of uranium.

The one that was moving with respect to the earth ran slower than the one that was fixed. But, as has been mentioned, in some of these experiments, GR effects were also present - clocks that move to a weaker gravitational potential will run faster, and that may end up being the larger effect. (and there is also the Sagnac effect present because we're in a rotating coordinate system) To clarify about the acceleration - if the clocks were compared during the experiment, each one would see the other as running slow. It is only because one clock was accelerated to move fast and again accelerated to slow down that it ends up running slower than the fixed clock. There need not be any measurable GR effects for this to hold.

And rockets, and they do it all the time now with GPS satellites.