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in a non nutonian fluid.
and spoon, i had not heard that. interesting.
Seeing as all of science is based on maths....
e^i? = ?1
......end of thread
du/dT * dT/dt = du/dt
but t has no effect on u, only on T. If you hold t constant, all the variation in u is due to T.
this might be a correlation causation conflation confusion
Sorry TINAS, but just because something is temperature dependant over time, and hence density/viscousity dependant over time, doesn't make it [b]primarily[/b] non neutonian, imo of course 🙂
The water is less viscous after some period of time.
Only as a result of the heat, not due to the passage of time. For it to be a time dependant non newtonian fluid the viscosity would have to change over time at constant temperature.
the shape of an aircraft wing is such that the air passing over the top of it has to travel further than the air passing under it.
IIRC, this is "GCSE science" and somewhere between a gross simplification and wholly wrong. I'll try and dig something up after I've done cooking.
Cougar is correct - the "goes faster because it has further to travel" notion is wrong. Why should the flow over the top of the wing have to arrive at the same time as the flow under the wing?
In fact, the shape of the wing causes the airflow to compress and this is why it moves faster - and why the pressure drops (Bernoulli's theory). This is still a bit of a simplification, but a better one!
Why should the flow over the top of the wing have to arrive at the same time as the flow under the wing?
Well because the faster flow underneath would create an area of lower pressure at the back of the wing to suck it over. Stevomcd's explanation boils down to the same thing.
Well if the air over the top didn't go faster then more air woulbe passing under the wing and as air is not compressible at subsonic speeds, conservation volume results in the air going faster over the top.
The sirflow does not compress, steve.
Well if the air over the top didn't go faster then more air woulbe passing under the wing and as air is not compressible at subsonic speeds,
Umm air is most certainly compressible at "subsonic speeds". All gases are.
Ok, but in terms of flight dynamics, in free air for mathematical models it is in effect incompressible.
Further it only becomes about 5% compressible at M0.5 and the Bernoulli model for flight applies at much lower speeds
Edit.
this therory works upon the princables that toast always lands butter side down and that cats always land on their feet. what you do is strap 4 peices of toast butterside up to the cats feet this means that the toast cannot land on its butter side and the cat cannot land on its back so you get levitation now wrap the cat in a thin layer of copper wire and place between two magnets and you have an unlimited frictionless supply of energy.
ill get my coat
Toast does land butter side up if you carry it butter side down. I can't believe this is not widely known.
I could come up with some equations given a bit of time. I might do this tonight for a laugh.
Toast does land butter side up if you carry it butter side down. I can't believe this is not widely known.
It's related to the height from which it's dropped. Which is usually worktop height. Which is based on the human form. The human form is limited by the physical properties of bone. This is caused by atomic structures and bonding. These depend upon the weak and strong nuclear forces, which were set during the Big Bang.
So, [b]the fact that toast always lands butter side down was built into the very fabric of the universe at the dawn of time[/b].
It's been a good week for science.
We might have cured AIDS.
http://www.abc.net.au/news/2013-01-16/scientists-hail-potential-cure-for-aids/4466766
We might have cured Alzheimer's.
http://www.sciencedaily.com/releases/2013/01/130115143852.htm
And in our spare time we're still exploring.
Hmmm that cure for AIDS isn't a cure for HIV. Don't get me wrong if it pans out then it's fantastic news but the headline is misleading.