J.C.MacSwell

The moon is tidally locked to the Earth. Mercury to the sun. I suspect there are examples of mutually locked.

I agree 100% but have to ask. Is this your opinion of any Big Bang Models as well? (since it is essentially not testable) Sorry if that is off topic.

Yes but the addition from the a x t approaches (read is) zero at the margin and will only start to factor in as starts to accumulate non perpendicularly to the instantaneous velocity. Sorry if that is unclear, I'm not wording it very well. For , say, circular motion at constant speed there is never any acceleration other than perpendicular to the velocity so the acceleration doesn't change the speed, only the direction.

Would a one in 65 millionth of a chance per year be a bad guess?

Many Worlds? I went with other.

I think we looked at this before and it should be presently very close to what the earth receives from the sun as you are implying. This would drop as it cools though.

This is for those that didn't think the Sun disappearing question was moot to begin with.

You seem to be neglecting gravity when you choose your smallest angle

Wouldn't that rule out time also? It isn't orthogonal to the first three. (although it is often pictured that way)

I think you just answered your question. 3.5m/s is the maximum acceleration for the lower block. Any slippage and it is reduced. 3.5m/s is the minimum acceleration for the upper block. Any slippage and it is increased.

In this example it works but if you vary your speed in a circular motion the force and acceleration vector would not be directed exactly radially. I agree with everything else for the special case, circular motion at constant speed.

In fact if the speed changes then the force of the acceleration vector will not be exactly radial or perpendicular to the instantaneous velocity vector.

Just a thought on this: Prior to failure they "flow" into a reduced effective contact area which then "fails" or breaks off. This gives it momentum as well as weight over the reduced area. The initial "pinching off" close to the surface is a "flow" toward a somewhat stronger bond from a somewhat weaker as opposed to a failure.

Pyramid Energy does exist. If you happen to be walking by one and a chunk of it comes loose and starts hurtling toward you, do not make the mistake of believing it doesn't.

It's spelled "sick":D

Seems like confusion reigns in the biggest extrapolation imaginable. Not really surprising but kudos to anyone who can take a genuine semi scientific (it can never be tested directly) attempt at it. Agree with Ecoli on this one.

Thought this was interesting though not technical. The latter part discusses humans with chimps. http://www.cbc.ca/news/viewpoint/vp_strauss/20060606.html "Which brings me to the humanzees. What would we do if one of them happened to come into being now? There have been attempts to create them, including astounding research in the 1920s in which Soviet biologist Ilya Ivanovich Ivanov first tried to impregnate chimpanzees with human sperm. He then artificially implanted orangutan sperm into women volunteers. His cross-breeding didn't produce any hybrids, but what if?" It's probably good that it wasn't sucessful as the moral issues would be staggering.

Off topic but they are using them again.

I think this is correct. The net force on each is 3.5 N and they accelerate at 3.5 m/s^2.

If it is not overcome, how do they move? Note that the normal force between the two blocks is only half that of the force between the bottom block and the surface. edit: oops missed the frictionless surface part I think you are correct and the net force on the bottom block will be 3.5 N

Like this, which will reach you before I type it, except now I think I might not type it after all.

I think you can, at least temporarily, it's only another 14.7 psi. Eventually you will get tired though, same as on Earth except sooner.

Exactly at the bottom if you will "land" after infinite drop and exactly at 45 if you have to "land" at that height. (the 45 degree height) So not enough info.