Externet

Hi. I learned somewhere that sun radiation (heat + light) passes trough glass as in a window, but the heat does not escape again towards the outside trough the glass, bouncing back and getting trapped indoors as in a greenhouse. I have trouble understanding the effect; does it mean an item enclosed in a glass jar indoors will not get warm as the heat will not pass trough glass again ? (except the amount of heat transferred by convection from room air to jar)

Hi. The temperature of the air along the path of a lightning bolt rises to many hundreds of degrees in about a tenth of a second; is that correct ?

Hi. Would you please let me know what dyes that you know are commonly used in households and industry ? (Not pigment particles in suspension) I can think of clothes dyes, hair dyes, fountain pen inks, food dyes. Others please ?

Those clever experiments developed by scientists along the years, as light spectrum on a prism, resonances, beam interruption wheels, mercury barometer column, magnetic induction, Millikan's, and many other share great lucidity in their conceptions. How would you design a clever experiment to measure the propagation speed of gravity ?

Hi. Passing an electric current, even for a brief second, has devastating effects on living cells, destroying/killing them. If a person has a topical infection, would applying electrical current confined to a short path within the affected area with reduced/minimal effect to healthy surrounding tissues work ? Does topical anesthesia work for minor electroshocks ? Does healthy skin, muscle cells killed in an electroshock get replaced by new growth ? Electrodes placement would need some thoughtful technique, but nothing seems extraordinary there. Thanks for opinions. -Please move post to proper section of the forum if this is not the correct one-

Finally found, resurrected this post to let know if someone has interest. Thanks. ----> http://jordanbunker.com/archives/41

From .net to .com ---> http://scienceforums.com/

The reverse of a river boat, being the river flow turning the paddle wheel of an anchored boat. How many horsepower would yield a 0.5m/s say-laminar river flow, for 1 m^2 submerged paddles ? Just a pictorial---> http://njscuba.net/zzz_artifacts/paddlewheel.jpg (not homework)

Thanks, gentlemen. Anders... would that be the case for an insulated magnet not contacting the seawater ? If yes, where from/to would the ions move ? Am trying to discern if the magnets in seawater work in this situation only if there is motion that causes electrical current, and not because of the magnetism : http://science.howstuffworks.com/environmental/life/zoology/marine-life/shark-magnet1.htm

Hi. A plain magnet, fully isolated from the seawater it is immersed in; as inside a plastic hermetic box. The magnetic field is present in the seawater. Now one of these things happen: Either the magnet is made to spin or move, or the seawater is put to flow around it. Does the electrically conductive seawater experiences an electric current in the vicinity of the magnet ? If there is no motion at all relative to each other, will there be no electric current ?

----> Please delete if improper language or anything. ----->http://video.google.com/videoplay?docid=-8308962544653504641

Just to clarify... All windows are shut. No outside air interacting with the colder air inside. It was just an observation, turning the car as in a 90 degree corner does not make the air inside to turn 90 degrees with it.

Thanks ! That was impressive, unexpected.

Hi. Is there any living organism with a wheel+shaft-like appendage ? There is feathers, cilia, tails, joints, paws, hooks, scales, wings, hair, and dozens more, but seems mother nature has not invented the wheel.

Disagreed. Would like to see the evidence of an illusion.

My next battery operated german toy, may need to wait a little for it, but been waiting way too long for a real flying saucer on the market. I will settle. Happy drooling ! -----> http://www.e-volo.com/Home.html

If a star, or a sun, 'burns/converts' matter into energy, chances are the homogeneity of its matter among its active surface is not, as flares appear in an area and later on another, as a non uniform surface 'burning' Is our sun propelled (transported, pushed) randomly in space by the energy flares it emits as to move towards opposite the random significant flares ?

Cannot understand you well... if the permanent magnet is moved at a right angle, its internal magnetic field lines move with it too.

Hi Ron. The subject has been plaged with too much hoaxes, false reports, misinformation and garbage from the public to the point the rest of the general public is fed up with it and do not pay attention to the genuine facts that may have occurred. In other words, the military got the cover-up they wanted by means and help of the misleading public along the years. The transistor, the optic fiber, nitinol (Nickel-Titanium-Naval Ordnance Laboratory) are products developed from extraterrestrial technology. Is there something specific do you want to know ?

Came across this, enjoy. ----> http://www.flixxy.com/water-drop.htm

-----> http://blog.makezine.com/2011/03/24/diy-scanning-electron-microscope/ -----> http://blog.makezine.com/2011/06/06/how-to-operate-a-homemade-scanning-electron-microscope/ -----> http://makerfaire.com/pub/e/5041

Thanks, gentlemen for your patience. I think I got the misconception clearer with your help. Perhaps the reason of my stubborness was the wrong perception of vacuum as being "omnipotent" when it is not.

Obviously my question had a very wrong wording. Or concept. Thanks for your patience. Trying again... Can only suction from a vacuum pump at the discharge side of an osmotic membrane and nothing at the inlet, achieve the same osmotic effect instead of the 'normal' case of applying pressure at the inlet and nothing at the outlet ? Reverse osmosis "normal process" : 1000psig ----->inlet---->membrane----->outlet----->atmospheric discharge If I only have a vacuum pump and no compressor, can the same reverse osmotic process be achieved ? Atmospheric------>inlet----->membrane------>outlet------>?inchesHg vacuum pump What amount of vacuum capability should the vacuum pump be ?

Thanks. Am sorry, does not make sense Differentials between pressure and partial vacuum are not this table thing.

The kilo prefix is with capital K (Kg for kilogram), as all multiplying prefixes above 1. Prefixes of multipliers under 1 are with lower case. A little help: A discotheque light that flickers its intensity at the loudness of music shows amplitude modulation. To detect it, a photocell would respond with a signal according to the brightness. A discotheque light that changes its color according to the frequency of the music would be frequency modulation. The amount of brightness keeps constant, the color changes. To detect it, a color sensing device would de-modulate it.