DrP

There must be a better way of reaching contentment rather than lying to one's self or others though.

they are not equidistant in a square though... the diagonal seeds are further apart by the square root of the sum of the squares on the other 2 sides (Pythagoras).

Only way I can think of is to make a little pyramid from earth. Plant one seed on each corner. Three will be at ground level in a triangle and the other one will be at the top of the earth mound. Is there another way to have them planted and equidistant?

Thank you arc - I will try some of the surface treatments. I guess the idea with the bleach is to hydroxylate the surface to promote sites for chemical bonds. I'll try that and the solvent treatment.

Another clue is that it is posted in the Applied Chemistry section rather than the Spank Me section of the forum. lol. But let's not too off topic eh? ;-)

Quote SJ: "Looks like the title..... page" I see you were straight in to see what was written SJ! Says a lot about you. ;-)

I have an acrylic emulsion based caulk with lots of various fillers and actives. Any suggestions for additives that would improve the adhesion of this caulk to natural rubber? The adhesion is not bad but the rubber gets compressed and I am looking for improvements in adhesion to the substrate under stress. There are probably industrial solutions out there off the shelf, but I wouldn't mind knowing what the chemistry actually is rather than buying a trade named additive. Keying up the surface of the substrate before application might improve adhesion too due to extra surface area to bond to, but I want a securer bond. I can envisage different functionality on the polymer backbone changing the adhesion properties, but this isn't an option in this case. (although I could use a different polymer system - maybe an epoxy would bond better?). What would be an easy fix would be an additive or a chemical that would improve the adhesion of this acrylic to natural rubber. Thanks. P.

They do have solar cooking devices which used a curved shiny metal surface to focus the rays onto the food. I think these can boil water too.

Someone more versed in university physics might be able to explain better, but I think it is just as simple as light travelling as waves means it is subject to the same treatment as any other waves - thus the Doppler effect applies. I am uncertain if there are any relativistic effects on the Doppler effect due to the speed of light.... but the wave particle duality of photons lets you consider it as a wave for travel and things like the Doppler effect and as a particle/packet for impact purposes. I hope that helps - I am sure an actual physicist will add more or correct me if I am wrong.

If you think about it though, it could have never have happened that way.... we started burning stuff like wood and coal WAYYYYYY before our technology even touched upon the possibility of constructing a solar cell. Can you imagine a cave dweller with a big club and animal skins grunting "Urrgg" discovering fire for the first time and then thinking, "Urrg... no! I must construct a silicon wafer and dope it accordingly and attach circuitry to produce electricity from the electrons excited in the wafer from the incident photons from the sun... Urrrrg!!!" I think it would be impossible - it is just the way technology evolves - building upon what we know already and the discovery of fire just comes way before electricity and solar power generation. PS - just to clarify - Fire requires very little understanding to make and use as an energy source. Solar power on the other hand is way more complex and requires a complex understanding of science to achieve anything useful from.

If it is not coming off with repeated washing and scrubbing then use a scented soap.... and keep washing your hands regularly over the next few days with plenty of scrubbing and scented soap. Take longer per wash than usual and do it more regularly.... and use the scented soap. It will go eventually. Maybe wear some better gloves next time?

Logical explanation I am unsure of... I would take a guess and say a circle probably gives the largest area within the rope. Something to do with larger internal angles? Circumference = 24 = piD therefore D = 7.638, so r ~ 3.82 Area = pi x 3.82x3.82 = 45.85 cm^2 I'll also take a guess and say that the more sides of the shape the larger area, starting with the triangle, 3, then square, 4 - up to the circle being of infinite sides. You could test this by working out the areas for the 5 and 6 sided shapes and seeing the values fit the predicted curve. (i.e. - 5 sides, area = 39.63cm^2... so seems to be fitting.) So might have something to do with number of sides compared to the internal angles of the shape.... the more sides there are the larger the internal angles are and the higher the area. The area becomes maximum as the shape approaches a circle (infinite sides).

".....not turn this into another geocentrism threads..." If it is one of your grey areas, then it is relevant. It seems so clearly wrong due to the level of complexity required. It's just not the premise that the other galaxies and SMBHs go around ours that I find impossible - it is the fact that with all that out there, with every other planet going around their stars.... why is our's different? Why is the earth still with a rotating sun (with other planets going round that sun too) but every other one with the star as the centre. It is ridiculous..... and I think you know it is too. You must be trolling - you seem far to well spoken to actually believe this nonsense. Regarding past civilization - why did they not hand it down to us like every other technology (tools, speech etc..) - where did they get this technology? Why was it lost? Where is there any evidence for it? we would see some in archaeology for sure.... and not the pyramids, they are well understood - basic buildings are easy to understand.

Black holes have been seen through telescopes Jeff....

I read it as "I am the centre!" as in "I am Sparticus!" - lol Hold on Scott - you are postulating that the sun is the centre of the universe right? Or that the Super massive black hole at the centre of our galaxy? Surely not that the Earth is?.... a child can work that one out to be false. Our sun is one of many stars in our milky way which orbits a super massive black hole in the centre. We have seen in the last 20 years or so that every galaxy has a SMB in the centre and that the stars go round it. How does all that possibly fit with the Earth being the centre? It doesn't make you any less special dear, you ARE special... keep on loving people and all, but get a grasp of reality.

QUOTE "Nothing about this model has been disproven"... It is clearly wrong - we have been into space and watched our earth go round the sun... come on man, I don't mean to be rude, but this is ridiculous! With what we know today this is like a child's postulation. Quote"....we had a deeper understanding of the universe and that possibly with that came advanced knowledge on harnessing energies on this planet." Again - utter nonsense. Not meaning to be rude, but what do you expect? Why did we loose this technology? Where did it go? Why are there no records of it at all anywhere? Quote: "what would be a better word to use to summarize my world view other than theory?" Drivel? Nonsense? Utter tripe? Come on! If we had some great understanding that we no longer have then why did we not pass this info down through the generation with other info that we learned from our ancestors like tool making, speech etc.. When was it lost? We haven't been on this planet long enough to have learnt something so amazing and then to have just forgotten it again.

I once used aluminium foil to wrap some parcels. I thought they looked awesome - like big blocks of silver!.... my father on the other hand went with the lecture about how much of a cheap skate I was for not purchasing proper gift paper... which is actually cheaper than foil and doesn't look as good. Typical though - I once spent a whole day hand carving him a walking stick. It had a little mouse on top exactly the same shape/appearance of a mouse toy we once had - I was quite proud of my work (I'm not much of an artist). I gave it to him on his birthday. He took one look at it and went "huh! - it's just a stick!" and tossed it a side... Because I had not paid for it in cash the present meant nothing to him, despite the hand blistering work that went into the carving. lol.

Quote: "It really can't tho..." Yes it clearly can. QUOTE:"You can't prove anything..." Nonsense! Your Geocentrism argument, for example, there is a hell of a lot of proof to say it is complete and utter rubbish and it has been shown here above by looking at the rotation of the earth and other planets around the sun etc.. Seriously - these 'grey areas' you are referring to - aren't so grey. Also - until there is some (any at all) evidence of a past super intelligent civilization on earth here before us, it HAS to be regarded as utter crap and the blitherings of someone who doesn't know what they are talking about.

Mike - Aren't we supposed to be in a period with less war and less starvation and hurt than ever before in the history of the civilized world? Yes, there are wars... but not as many as there have been.... what I find ironic is that all this trouble in the middle east is pretty much directly caused BY religion in the first place, yet the religious blame secularism. We are improving - and Christian and Islamic mythology doesn't like it because it proves their respective BS books wrong. Maybe that's why the Yanks have voted in a right wing nutter to go crusading in the Middle East to stir up a massive world war III so we can all have our promised Armagedeon. Wankers! So to sum it up - the world is a better place today (for humans) than it has ever been. Will it spiral into world war? Maybe, if the religious nutters continue their idiocy. Time to put Islam and Christianity onto the pile with all the other mythologies like the Roman, Greek, Hindu and Pagan gods myths.

QUOTE: "..Hindu mythology we have god in form of .... cow and ape." Yes - in the Christian mythology it states that we are in God's image, so they picture god as a man.

PS - just a further thought - I think people are caught up with semantics here. There is also 'muscular memory'. This doesn't mean that muscles remember or think - it means the neural pathways from repeating a singular or a combined muscular movement over and over and over again have been burned into place by being written over and reformed so many times it becomes 'second nature' or 'instinct'. I think this is the same and is what is meant by 'knowing by heart'. So: by 'knowing by heart' a poem or a book or a speech - it just means that you have gone over it so many times that the neural pathways in the BRAIN have been so well trodden that you don't really have to work very hard to recite it. The info isn't actually stored in the heart. RE Pain: You are right, the brain doesn't 'feel' the pain, my hand does (if my hand is injured). This is not my hand thinking though is it. It is the nerve endings in my hand sending a message to my brain, where all the info is processed and sorted. The actual thinking is done in the brain.

Being fair to the OP I don't think he's talking about perpetual motion here Bender. He is talking about a breathing machine for use underwater. He is suggesting that you could use the water to produce oxygen to breath via electrolysis.... the recombination is just some effort to make it more efficient, but it would probably make it a lot more complex and dangerous too. PS - Out of interest - could you breath the O2 and the H2 purely produced from electrolysis? H2O would yield twice as much Hydrogen than Oxygen (per mole) ... which is about 33 molar percent Oxygen in Hydrogen. Could one breath such a mixture of pure Hydrogen with 33% Oxygen? Air has about 21% O2.... I guess it doesn't matter what the other gasses are (as long as they aren't poisons).

Refaat - I did read it. I read that paragraph you quoted and still hold the same view. Just because people reacted differently to seeing pics of people whose hearts are beating similarly or differently is no indication that the heart thinks.... maybe we do pick up on things that others are feeling... but the info processed to make that decision is made in the brain. As for 'feelings' in other parts of the body - well, these feelings are caused by messages sent to those body parts from.... guess where.... the brain!

We had a thread on this recently - there is no thinking done by the heart. The link doesn't give any evidence for it, it just says that some experiments were done (without explaining them) and then concludes that their 'might' or 'could' be something to the expression.... which probably means there isn't. The heart is a pump for blood. The thinking is done with the brain. What do you think?

Check out the laryngreal nerve in a giraffes neck compared to that from a fish. It is an amazing clear example of how something has evolved over millions of years. Just type "Laryngreal nerve, giraffe" into google. As for resources for your class, I am afraid I cannot recommend anything... other than looking up the thing with the giraffe and the extra long nerve.