Externet

Won't be Mickey Mouse ? :-(:-( -Stuck to and happy with 7.10-

:-( Now am complicating myself... I thought that the launch rocket had horizontally the same angular speed of the spinning earth surface, and if when rising vertically up from the equator, the satellite would carry such same 'horizontal' speed component when reaching the straight-up altitude, staying geosynchronous above the equatorial launch site because of that 'horizontal' speed, keeping the launch site directly underneath. Sorry for the poor wording but have some difficulty expressing it properly. Thanks.

Unsure to understand... If a geostationary satellite is wanted to land directly and vertically down on the equator, is there more than that 1.5km/sec initial push downwards needed to bring it down with a simple parachute, ? (discarding winds) In reverse, could a geostationary satellite placement from a launch station on the equator be carried by only a vertical straight up 'flight' and release it with zero velocity when reaching the proper altitude ?

Hi. As the shuttles, when returning to earth have to dissipate its enormous kinetic energy by counter propulsion (expensive) or braking trough the atmosphere; what if the orbit is geostationary ? Would then a tiny impulse towards earth to start falling from orbit and then a parachute suffice ?

If "-" is one magnet and "|" the other, they can be perpendicular in these ways : -| and _| Which one are you talking about ?

Nice !. Thanks, John. The 'Applications' paragraph in your link shows "Large scale brackish and seawater desalination and salt production" If the membranes could be made at low cost -not medical grade$- and not as expensive as reverse osmosis membranes; seawater could have some better drip irrigation potential. Am assuming high pressures would not be needed Now, what do they consist of ? Any hyperfancy material$ ? Google is showing results for "electrodialysis desalination" ... time to read. But I know no german: http://www.pca-gmbh.com/appli/ed.htm

Zero interest in this thread for sodium. Just wondering if any electrical method is applicable for desalination instead of evaporation/osmosis

Hi. Formulas and calculations for the slow tube air dissolving into the liquid could be better exposed by someone with deeper scientific background as many are qualified in this forums, considering the temperatures and atmospheric pressure variations, and area of the liquid-to-air surface inside the tube. I will stay in the qualitative corner. Occurs to me that if the liquid is periodically (daily?) emptied and immediately returned to the vessel, the sensing tube will renew its air level to confirm or discard if my 'dissolution' suspicion is the reason for the gradual discalibration. Another way would be to briefly remove and return to submerge the sensing tube to 'reset' its reading. There is another way, by (daily?) purging from an upper 'T' As a domestic washing machine level control that uses the same principle, every time it is emptied, the tube fully drains. Every time it is filled, has a reset point to start sensing its water level by sensing the air pressure in it. Miguel

Hi. Electrolysis on salty water accumulates dissolved ions at the electrodes, as far as I know. After all the ions have attached/combined/bubbled/removed at the electrodes, what happens ? Is the water still 'conductive' ? Is there a precise voltage that does NOT dissociate H2 and O2 and leave the water unchanged and only remove the dissolved salt ions ? Or, how can the electrolytic process/electrodes be tailored to remove only ions and leave reasonably pure water ? Miguel

Hi all. Lunatic questions... Could an apple tree branch receive a lettuce sprout and develop ? -Different botanic families . What are the limitations, compatibilities or guidelines ? What determines feasibility ? Could a mangrove get a tomato grafting ? Could a pine bear avocados ?

Health care costs... In my younger days, the doctor used to come home when I, or my grandmother, or anyone was ill. Because being sick is obviously not simple to go to the doctor's place. And whatever was its bill, was paid cash during his visit at home. A bill that perfectly reflected time and knowledge and expertise. Nothing cheap, nothing out of the ordinary amount. And the doctor lived a very decent life with the compensation. Now, There is no such 'normal' service. You go to the doctor's office on your own feet, or in worse case take an ambulance. When you go to the doctor's office; the bill you are paying is also for the rental of the office (large enough to set several persons each waiting turns in rooms) , for the secretary salary, for the helper's salary, for the computer systems and extra gadgets to squeeze more time from the work day. If you have medical insurance, you are ALSO feeding an army of paperpushers, the office rental for the insurance company, the hospital facilities with they hyper-inflated costs (more organizations with their paperpushers selling hyper-inflated equipment), a bunch of nurses and ancillary personnel salaries. If you used the ambulance, there is another bill to feed another organization, driver, another nurse on board, more paperpushers, operative costs, equipment depreciation (all that aboard an ambulance has hyper-inflated costs too) Plus whatever am forgetting... Medical care turned all about pure greed, to wring the wallet of the sick to the maximum and beyond by creating more and more suckling outlets from an illness. So probably the next step will be the birth of some new sort of insurance company to insure the ill can afford health insurance. Meanwhile, the tireless advertisement effort from medicine manufacturers trying to convince the public that you may have such and such rare condition. And just to be safe, to convince you that if you do not have such rare condition, you are prone and at risk of developing such condition; so better take that $20/day pill for prevention. That $20 daily pill amount goes $0.1 to make the pill, $15 to pay television advertisements, $5 to another bunch of greedy stockholders pushing for more revenue. It is not your health care any more. It is their wealth care. Miguel

Can be both; 1- and 2- 2- being probably air dissolving into the liquid. As a fish breathes the atmosphere dissolved in water. A better way would be a submerged deformable sealed 'bladder' instead of a tube that allows an interactive surface between air and liquid.

Because is driven by alternating current, which turns off and on ~120 times every second, inducing magnetism on the pot at the same rate.

Hi all. Never used one, never lived in a house with a fireplace or wood-burning stove, and would like to find out if installing one in my small house would be wise. The existing chimney has a 8" port hole on a side as there was one installed long ago. Just an image of what I would like: http://www.rickdenney.com/images/wood-stove-lores.jpg My concerns (from ignorance) is that such device uses the room air for combustion. That air has to creep-in into the room trough poor window and door seals, meaning that exterior cold air gets sucked-in, diminishing the heating purpose If such device could suck its combustion air from the crawling space under the house, would it be better ? Are there wood stoves with ducted air inlet ? Do those 'models' have a specific name ? I could drill the floor to use the crawling space air to burn instead. How easy is to set it wrong and get fumes/stench in the living space ? Would a smoke detector be typically constantly activating ? Would a CO2 detector be a mandatory gadget to have ? Thanks. Edited: added ---> Is the lower duct in this found image what I mean; or could it be added to a stove lacking one ? Any mysteries ? http://tinyhouseblog.com/wp-content/uploads/2008/03/woodstove.jpg

There is some followers for this dowsing stuff : http://simmonsscientificproducts.com/universal_antenna_rod.html I do not know where the 'scientific' part fits in.

--- Let's keep it within the legal domain, yes ?

Perhaps not the perfect site for the subject; please re-direct if neccessary. I believe there are plants that are highly sought after for elaboration of medicines, extracts or complex compounds for research or production of much needed chemicals. Could anyone name a few, please ?

Was not to implement it, just to learn how it works. Thanks.

Thanks, gentlemen. The answers escape my level of comprehension; I will need to learn more about the basics to grab the concepts, and perhaps re-word the same question in the future. From what I understand, the energy to run continuosly a vacuum pump to evacuate the vapors in partial vacuum distilling plus the heat energy supplied is more than doing the same at 1ATM, no pump. Choosing partial vacuum distillation over atmospheric is not aimed to save some energy, but for other reasons as maintaining a lower temperature; of when the temperature of the heat resource is low. Then, to distill seawater, the 'energy price to pay' for the task is not decreased by the lower temperature-partial vacuum technique. Something left out is Takes 1K cal to raise 1 litre of water 1℃ at 1 ATM Takes 540K cal to evaporate 1 litre of water at 1 ATM ----> If the water is in partial vacuum, are the figures 1Kcal/Kg and 540Kcal/Kg still valid constants to use ? Thanks for the patience

Hi all. A litre of water at 25℃ needs a certain amount of calories to become steam at 100℃ ∆t=75℃ (75Kcal + 540Kcal =615Kcal) if I remember the figures. That is a 1 ATM. Under partial vacuum, such energy requierement can be less. Let's say it boils at 45℃ under such partial vacuum ; ∆t=20℃ thus would need 20 Kcal + 540Kcal = 560Kcal ---> Are the calories needed at 1 ATM and under partial vacuum constants ? The difference in energy needed to achieve the same are different under the different pressures. Some extra energy has to be used to run a vacuum pump. ---> Is the sum of energy to boil at 1ATM equal to boil under partial vacuum + the energy to run the vacuum pump ? In other words, does vacuum distilling uses less energy ? Sorry for my poor wording

Thanks. I expected to see the video, but could not pull it at the site: http://www.dw-world.de/dw/article/0,,4820233,00.html

Hello. Just saw announced/shown on television an experimental 'old' car running plastic scraps into a gasification reactor fitted in the engine compartment, yielding 30% less fuel consumption. The small device appeared to be about 1 litre size. How does it work ?

Inflate a balloon with air. Fill an identical balloon to the same exact volume with water Drop them simultaneously from your hands from exactly the same height. No need to climb on a building. They are both same size, same shape, same coheficient of friction. They have different masses. Check if they hit the floor at the same time

Interesting, you have not noticed it... How can a mosquito have the strenght/ability to grab onto something or have the instinct to prevent from being carried when soo many other more massive things are transported far away in a soo strong wind force. Is the only thing left to speculate, the mosquitoes after a hurricane were residing far away before the event ?

Is there any mosquitoes, flies, birds ? For how long ? Did most die or were just carried away ? (or new ones brought with the wind) If they persist, how does something like a dragonfly manages to stay put in the area ? Is it a major factor for dissemination of species across regions ?