J.C.MacSwell

You need to heat the room considerably before the event to raise the temperature of the walls and floor then ventilate the room during the event. If the surface temperature of the walls/floor are below the temperature of the dew point they will "sweat". Adequate insulation can help as well, and of course lowering the dew point or RH of the ventilation air.

Can't comment on the article, but often in flows the drag will drop when the skin friction increases. Turbulent boundary layers will often delay separation, which can reduce form drag (or increase lift by delaying separation) Not sure exactly how the swimsuits work, but it may be related.

So, it suffered permanent deformation from the tension of the original hanging of the mass, without full failure. It still has some elasticity, "it stretches a bit and stays stationary", even if changed considerably from it's original state. Some of it's properties have changed, but essentially it is loaded in substantially the same way. If it doesn't fail completely by breaking, it remains in tension. The string may actually be stronger than original, the yield strength may be greater, as it may be able to carry a heavier load without further permanent deformation.

Rain bread for me to thanks, as you can eat it while thinking about it. But how about the bowling ball on a trampoline analogy for gravity? You actually need gravity itself to make the "analogy" work...and what about the springs around the perimeter? What are they supposed to represent?

You're on the right track. There will be no net momentum change to a system without an outside force. In terms of displacement, if the centre of gravity of a closed system is not moving, there is nothing that can happen in that closed system to displace the centre of gravity...so at the point the bullet is, say, 20 yards to the right, there must be an equivalent displacement of mass X distance to the left, whether it is the gun, you, or the ground etc.

It doesn't. The bullet, because it is less massive, accelerates during the interaction over a longer distance, and therefore receives more of the energy. Same, but opposite, momentum transfer, but different energy.

In order for it to do this it gains momentum. Similarly, when you leap off the ground you do not stop immediately on cessation of the push against the ground.

Definitely not correct.

You could try playing "swat the photon", by moving a lens fast enough toward it.

The explanation I was given was that given a blow to the head from the side, it would leave the body more able to defend the side from which the attack came, since the opposite side had control of it. I was quite young when I heard that, and never really questioned it.

Possible fossil evidence of virus from Mars? ALH 84001 http://nssdc.gsfc.nasa.gov/planetary/marslife.html also:

The entropy of the Earth may be higher or lower than in the past. The Sun's has certainly increased, by much more than any difference.

If they are not moving wrt each other then they would agree on simultaneity, regardless of the distance. Of course they would not know immediately what had happened.

Kudos all the same for all your attempts, and congratulations on the time, or times, you succeeded

Yes, From any inertial frame, So how do you choose an absolute one?

http://en.wikipedia.org/wiki/Drag_equation

The turbulence from the seam on the upper surface (as drawn) makes the flow more robust on that surface of the ball, mixing it with the stagnant air behind the ball and sweeping it away. This allows the flow to travel further around the ball, with the air exiting more downward than it otherwise would. In contrast, the lack of turbulence on the underside allows the wake air to remain longer, forcing the flow to separate earlier and exit more parallel to the flow (flow relative to the ball). The net result is an upward lift on the ball since the air is deflected downward. Probably not enough to make the ball rise, but more likely drop less than expected. Thrown with the seam on the forward right quarter there would be a significant curve in that direction.

It's the Coanda effect. While Bernoulli's effect is involved, the air above and below the paper are in different flow regimes and Bernoulli's equation does not apply. The blown air entrains and sweeps the dead air from above the paper, which the paperers shape/proximity deflects downward , reducing the pressure on the paper and causing lift. For the PS: The air in the high pressure zone accelerates toward the lower pressure zone in the velocity and pressure field around the wing, which in turn effects the velocity and pressure field around the wing and the pressure and thus net forces on the wing. This increases at greater angles of attack, until the Coanda effect is somewhat lost, and stall occurs, sometimes abruptly. So it is all related.

Isn't a black hole considered to be everything inside it's event horizon?

You should have Connery blowing on the barrel of the gun after that one!

For starters, the moon.

Essentially this. If you spread out your organism on a surface, no taller than a beetle, it becomes a squared-squared law...you can make it as large as you like.

eight minutes may be less precise, but it is always correct. eight minutes 19 seconds is wrong, most of the time/year.

Yes.

It would be quite a "bump"!