:D
Just to document it in this thread: I've just noticed on the internet that this very question of mine (see the beginning of this thread for reference) mysteriously popped-up here somehow:
Edit: removed link
I don't know who posted it there (but it would seem that more people are...
Hmmm... As an extreme example: copper is an element known as a great magnetic "insulator", but if a strong enough magnetic field would be applied - would it be repelled or attracted?
(And how strong a magnetic field must be in order to affect it just as strong as two magnets interact? (e.g. for...
Actually I was asking about a table that describes how magnetic the material is in numbers. (how is it called? 'coefficient of magnetism'?? or what?)
Something like:
sulfur | 0.0000000000145
phosphorus | 0.0000000346
and so on :D
Just by the way, to write it down, just for the sake of discussion: the original thought was - sort of an in situ** application, not ingestion - a direct contact of menthol with spermatozoa and in the first post I mentioned some ordinary common inconspicuous product as an example* for testing...
...Someone must have already, it's too common substance not to...**
As I said - that page is the only related information that I could find on my own in the first place, but I was confused - what is the meaning of it: would supposed menthol induced acrosome reaction destroy spermatozoas...
... This is a forum which deals with science - it's obvious that my question is in such spirit - else why would I post it here -- your attitude is confusing; the question was and is perfectly simple -- I mean I don't get it why these subversions take place. -
Here: Imagine a lab and scientists...
(...I can't really believe that I still didn't get definite answer; why is it so hard to test it - surely someone (if not all) the people who read my thread have a microscope in their possession...)
Yea', I've found it too when I was first looking - but does it mean menthol opens a spermatozoon prematurely and thus destroy it or it makes it more ready to fuse with egg cell?
...Gee... how I would like to have a 1000x microscope...
How come - haven't anyone tested it already? - I mean it is a substance too common not to have been tested on ALL sorts of things.
Doesn't it have bactericidal properties?
...
...Anyone have a microscope?
(I mean - to test it and present the results... not to lend me one :B )
Does menthol kill spermatozoa or is it neutral... or maybe even helps it somehow?? (I don't know - I don't have a microscope, and Internet says nothing about it specifically so I ask)
Now - someone would say "Well - you know - it depends on concentration!" - so - here - for example: say you...
I've read some time ago about experiments with supercooled superconducting materials that can be used to carry tremendeous amounts of current and create superstrong magnetic fields unafected by induction feedback (or something). ...Can't find it on the 'net now though.
Ha ha - something like a nuclear reactor inside? (And fan blades in the middle circle of the disc (as the entire saucer is spinning) to help lift-off while in atmosphere.)
...Hmmm - maybe entire surface of the saucer covered with solar panels (but there is no 90 degree sunlight on poles)
(Ha...
Maybe we didn't look at the right place, maybe it is minuscule in nature (but could be artificially produced in massive quantities) maybe it doesn't occur naturally at all, maybe its effects are in action exclusively in combination of two (or more) materials, maybe it occurs in some combination...
Some time ago I've seen some dubious documentary about the times of World War 2 and how nazis supposedly had some secret base on Antarctica and were experimenting with disk-like vehicles that were supposed to go into space -- they don't even have to explain how it would work - the choice of...
We know there are (those mostly observable) fields like: gravity, forces between molecules, magnetic fields, electric fields, and infinite frequencies of electromagnetic fields, but:
What totally separate (special in a way), different by nature, totally new sorts of radiation or physical...
Actually I think I've found it:
http://en.wikipedia.org/wiki/Hydrogen
"The hydrogen autoignition temperature, the temperature of spontaneous ignition in air, is 500 °C (932 °F)."
That high! ...I would have thought it's much lower. ...No way; that must be wrong. (?)
Which reminds me: if you heat the mixture continuously (starting at room temperature and gradually increasing but not to slow) at what temperature would it ignite?
Even at ambient temperature it occurs that H2O splits into H2 and O2:
http://en.wikipedia.org/wiki/Water_splitting
:
"but at ambient temperatures only one molecule in 100 trillion dissociates by the effect of heat"
"Thermal water splitting has been investigated for hydrogen production since...
Does mixture of hydrogen and oxygen actually has to be ignited or the reaction occurs even without ignition when some critical H:O proportion is reached?
Can someone point me to 3D model of surface of the land and ocean floor of the Earth,
or a grayscale elevation map so I could make my own 3D model from it.
I was curious - I wanted to play a bit with such "flat" (rectangular i.e. not spherical) 3D model of Earth's relief by placing a flat...
How silly is this?
Catalysts work as sort of small chemical reactors -
they react with molecule of substance one and then the molecule of substance two is brought in the reaction
so those two can react now creating one or more new molecules as a final result
and also, by the way...
OK, some time has passed - did someone try to figure out geometry to make say 300x magnification with multiple water drops "optical system" (lol)?
(By the way - does it mater how light rays enter eye - I mean - do they have to be parallel or can they by like focusing/diverging and you still see...
My idea was to stack elements with water drops to obtain greater magnification. (not just one water-lens (what... just x2 magnification))
I cut some transparent plastic (some food container; the shape of pieces was irregular - it doesn't mater) and placed water droplets on them but I couldn't...
Is it posible to make a telescope using water drops?
(water drops are to be on transparent plastic or glass, set at desired distance; convex lense is a free drop, concave is a water drop in a ring (because of surface tension))
What is the...
...ah - there it is:
http://www.webanswers.com/science/at-what-temperature-does-hair-melt-269dba [Broken]
("At what temperature does hair melt?
Depends on the moisture content of the hair. Dry human hair will melt at around 205 degrees C (401 F), and with a moisture...
It breaks, but first it gets thin - right?
As I said: "The only rule is that it must stay rooted to skin (generally no damage to the skin)."
I think chemicals would affect the skin as well (the only way to avoid that is to apply chemical to the hair ONLY).
Tricky.
Yea'. I typed "dissolve...
:D ha ha...
No, seriously - tensile strength of human hair is 380 MPa (acording to: http://en.wikipedia.org/wiki/Tensile_strength ).
My bet (for now, until proven otherwise) is stretching it.
Unusual physics question :)
How to make a hair which is still properly rooted to skin (any hair, not just on head) become very thin at the end?
(gradual thinning toward the tip)
:D
How would you approach this physical problem - by applying mechanical force (stretching it, or abrading it, or...
As I said - the purpose of commercial itself is clear, I ask - nevertheless why does it have to be moronic.
It can send the message without depicting stupidity.
I thought - why not - let's try to find some thoughts regarding this issue on the Internet, but results were inconclusive, so I came here - I mean people with PhD's in these fields (sociology, economy etc.) come here (right?).
Just to "paint the picture" I'll give some examples: a woman who...
Quote:
"There are IMAX theaters that cover a hemisphere, but those use multiple projector system, AFAIK. "
It would be nice to have one unit which projects upwards and covers even more than half of sphere (some 15m diameter or greater)...
Incandescent light bulbs create more useless...
A bit about optics. I was wondering what is the film (slide, or motion picture) projector with the widest projection angle. What are the current limitations?
I'm interested only in the case when elastic forces of the paper are still at work, not when paper "breaks" and fold at sharp angle.
Imagine that finger-nails face each other, so the nails pin the paperstrip to the surface of the desk while paper slides e.i. contracts which make it bulge -...
In the example with paper strip I described the index fingers are not placed at the ends of the paper strip - they are placed some distance away from the ends of the paper strip, so the elastic forces of the paper strip are at work at the point where index fingers are.
-------
The catenary...
no.
I meant when you place a paper strip on a desk, then press the ends of the paper strip with index fingers, and then slide them toward each other with paper strip ends stuck to the fingers, so the section of the paper strip between fingers lifts up from the desk and forms a curve.
...Yeah, I almost forgot - what about this question of mine (already asked up there):
When you take a paper strip, put it on the flat surface (table), and contract it so it stands up - is it parabola or something else?