How do I create the reaction driven diver?
552084
I assume this is based on the principle of Osmosis. I would like a bit more data before answering further.
980626
ChemDraw from CambridgeSoft Corporation may be help you. Look at www.cambridgesoft.com
89291
I just saw on the Discovery Channel that they have created a shark repellant.  This is a device that omits a frequency that the shark dislikes.  A scubba diver attached this to his tank and then the swimmer pushed a button that released the frequency...I guess sharks do most stuff because of vibrations and frequency in the water...it's kinda like their eyes.\n\nAnyways, scientists are hoping to develope this further so they can get rid of nets along the coast <which kill sharks, dolphins, and turtles>.
438161
Send down a SCUBA diver to look!  Just kidding.  Your idea to pump out the well and see what happens sounds good.  If you have a camcorder, you could tie it to a rope and lower it to the bottom to have a peek like in the movie Volcano.
731663
Without introducing a 3rd substance, there are only 2 methods to accomplish what you're asking.  \n\n1/  increase the density of the substance you want to submerge, but without knowing the physical properties it's impossible to propose anything\n\n2/  decrease the density of the water:\n\nput whatever you want to submerge in a pressure vessel and pour in water.  make sure that the combined volume of the water and the substance is less than one or two percent of the total volume of the vessel.  place the lid on and heat until the temperature reaches 120 to 130 degrees C.  your substance is now submerged in water.\n\nYou'll want your teacher to assist to prevent an explosion.
385368
CHk this out\n\nhttp://www.autohelm.com/raymarine/SubmittedFiles/Handbooks/Autopilots/cr_pump.pdf\n\nhttp://www.autohelm.com/raymarine/SubmittedFiles/Handbooks/Autopilots/hydraulic_linear_drive.pdf\n\nhttp://www.raymarine.com/raymarine/SubmittedFiles/Handbooks/Autopilots/hydraulic_pump.pdf\n\nhttp://www.rockbreaker.com/parts/PDFs/serv_docs/150-4056%20-%20Testing%20&%20Adjusting%20Pumps%20&%20Valves.pdf\n\nhttp://science.howstuffworks.com/hydraulic-crane1.htm\n\nhttp://www.elevatorcontrols.com/downloads/files/NordicInstBook.pdf\n\nmng.1432@gmail.com
407020
I'm not sure what model watch you have.  The best thing would be to take it to a local dive shop and see what they have to say.  I do know that in order to use a computer with Nitrox your computer has to have Nitrox settings.  If your computer doesn't have Nitrox settings you will have to buy what that does.  In order to breath Nitrox you will have to take a class first you can ask about that at the dive shop as well.
868418
# Anoxic autotrophs: Obtain hydrogen from chemicals such as sulfur.\n[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[Dead Zones are areas where the bottom water (the water at the sea floor) is anoxic, meaning that it has very low (or completely zero) concentrations of dissolved oxygen.]]]]]]]]]]]]]]]]]]]]]]]]]\nDead Zones are areas where the bottom water (the water at the sea floor) is anoxic, meaning that it has very low (or completely zero) concentrations of dissolved oxygen. These dead zones are occurring in many areas along the coasts of major continents, and they are spreading over larger areas of the sea floor. Because very few organisms can tolerate the lack of oxygen in these areas, they can destroy the habitat in which numerous organisms make their home.\n\nThe cause of anoxic bottom waters is fairly simple: the organic matter produced by phytoplankton at the surface of the ocean (in the euphotic zone) sinks to the bottom (the benthic zone) where it is subject to breakdown by the action of bacteria, a process known as bacterial respiration. The problem is, while phytoplankton use carbon dioxide and produce oxygen during photosynthesis, bacteria use oxygen and give off carbon dioxide during respiration. The oxygen used by bacteria is the oxygen dissolved in the water, and that’s the same oxygen that all of the other oxygen-respiring animals on the bottom (crabs, clams, shrimp, and a host of mud-loving creatures) and swimming in the water (zooplankton, fish) require for life to continue.\n\nThe "creeping dead zones" are areas in the ocean where it appears that phytoplankton productivity has been enhanced, or natural water flow has been restricted, leading to increasing bottom water anoxia. If phytoplankton productivity is enhanced, more organic matter is produced, more organic matter sinks to the bottom and is respired by bacteria, and thus more oxygen is consumed. If water flow is restricted, the natural refreshing flow of "oxic" waters (water with normal dissolved oxygen concentrations) is reduced, so that the remaining oxygen is depleted faster.\n\nMany of the areas where increasing bottom water anoxia has recently been observed are near the mouths of major river systems. While Satellite images can’t see the bottom of the ocean, they can see the surface, where sediments from rivers mix with ocean waters. The images shown here are Satellite images (SeaWiFS) observations of the Mississippi River delta, the Yangtze River mouth in China (The Yangtze River mouth is not currently identified as an area with an associated dead zone, but such conditions could develop there in the future), and the Pearl River mouth in China, near Hong Kong.\n\nSeaWiFS can also observe areas where water flow is restricted, such as the Baltic Sea in Europe. The image on the left features Denmark after strong storms caused flooding and increased sediment suspension in the Baltic. On the right is an overview of the Baltic Sea, including a plankton bloom in the Skagerrak just north of Denmark.\n\nThe apparent cause of the creeping dead zones is agriculture, specifically fertilizer. While fertilizer is necessary to foster bumper agricultural crops, it also runs off the fields into the streams and rivers of a watershed. When the fertilizer reaches the ocean, it just becomes more nutrients for the phytoplankton, so they do what they do best: they grow and multiply. Which leads to more organic matter reaching the bottom, more bacterial respiration, and more anoxic bottom water.\n\nThese effects can be magnified by catastrophe. When the heavy rains of Hurricane Floyd caused extensive flooding in North Carolina in September 1999, the heavy load of nutrients (from dead animals, flooded animal waste ponds, and numerous other sources) reached the sounds that lie between the coast and the Outer Banks, oxygen levels in the water plummeted. The picture at the top of the page shows the heavy load of sediments flowing into Pamlico Sound. SeaWiFS captur
684008
I've learned that reinventing the well is not really the best solution.\n\nI've tried this solution and it works perfect for my need:\n\nhttp://www.codeproject.com/cs/miscctrl/csharpgridcontrol.asp
929685
When you have weak electrolytes, (equillibria in general) you should make the following table.\n\n1. write the reaction\n\nHNO2 <=> H+ + NO2-\n\n2.Put the initial amounts (expressed as concentration) of each molecule. In this case we have only the concentration of HNO2, so\n\n.. .. .. .. .. .. HNO2 <=> H+ + NO2-\nInitial .. .. .. .. 0.5\n\n3.Assume that an unknown amount "x" of the reactants react.\nThen write also how much of each product you expect to be produced according to the stoichiometry. In this case 1 mole of HNO2 gives one mole of H+  and NO2-, so x mole/L HNO2 will  give x mole/L of each and our table becomes\n\n.. .. .. .. .. .. HNO2 <=> H+ + NO2-\nInitial .. .. .. .. 0.5\nDissociate .. ..x\nProduce .. .. .. .. .. .. .. ..x .. .. .x\n\n4. Ka is an expression for the concentrations at equilibrium. So let's see what are those. For the reactants you will have initial-what reacted. We have only HNO2 with 0.5-x. For the products it will be the initial+what was produced. We didn't have any intial so it is only what was produced (x for both of the products). Thus the table in its final form is \n\n.. .. .. .. .. .. HNO2 <=> H+ + NO2-\nInitial .. .. .. .. 0.5\nDissociate .. ..x\nProduce .. .. .. .. .. .. .. ..x .. .. .x\nAt Equil. .. .. 0.5-x .. .. .. x .. .. .x\n\nKa= [H+][NO2-]/[HNO2] = x^2/(0.5-x)\nNow you either solve the quadratic equation and find x, or we assume that 0.5 >>x and practically 0.5-x=0.5.\nThen Ka=x^2/0.5=4*10^-14 =>\nx=squareroot(2*10^-14)= 1.4*10^-7. It is much smaller than 0.5 so our assumption is valid (otherwise we would have to solve the quadratic and get an exact solution).\n\nFor a simple level of chemistry we would now say\npH=-log[H+]= -logx =-log(1.4*10^-7) = 6.85\n\nHowever for more advanced and accurate expectations we see that the H+ coming from HNO2 is found to be in the same order of magnitude as that coming from the self dissociation of water (10^-7 for distilled water). Therefore in this case we cannot ignore the self dissociation of water (as we usually do) for calculating the pH. \nThere are 2 approaches for this case, here is one of them.\nRemember that we didn't put an initial amount for H+ since in most cases we ignore the self dissociation of water. Now we will consider that we had pure water, so the initial concentration of H+ is 10^-7 and we want to see how much the HNO2 will dissociate under these conditions so our table becomes\n\n.. .. .. .. .. .. HNO2 <=> H+ + NO2-\nInitial .. .. .. .. 0.5 .. .. .. 10^-7\nDissociate .. ..x\nProduce .. .. .. .. .. .. .. ..x .. .. .x\nAt Equil. .. .. 0.5-x .. 10^-7+x. .x\n\nand Ka=(10^-7+x)x/(0.5-x)\nNow we have to solve the quadratic so we can't do any simplification\n\n0.5Ka-Kax=10^-7x +x^2 =>\nx^2+ (10^-7+Ka)x-0.5Ka=0\n\nThe only acceptable solution is the positive one\nx=0.5(- (10^-7+Ka)+ squareroot (D))\nwhere D=(10^-7+Ka)^2-4*(-0.5Ka)=\n=(10^-7+4*10^-14)^2-4*(-0.5*4*10^-14)\n=9*10^-14\n\nand x=0.5*(-((10^-7))+4*10^-14) +3*10^-7) =10^-7\n\nso now pH=-log(10^-7+x) =-log(2*10^-7) = 6.70
206901
Add heat.\nAdd a catalyst.
239697
Do you mean racing dives or competitive dives?\nFor racing you are trying to get the furthest dive with the best entry and most momentum. A shallow, fingers first entry with a lot of forward motion when you are going into the water. You should be as streamlined as possible.\n\nCompetitive dives are a little like gymnastics. Certain moves must be done and are scored on difficulty and completion of key elements such as the entry and the position of the body during the dive.\n \nI hope that was helpful. If not, write more specifically what you don't understand and re-post the question. If you want more details, talk to a coach in your area if possible.
469473
Self Contained Underwater Breathing Apparatus
485922
the minimum amount of energy required to start a reaction
610453
build a basic suspension bridge\nuse baking soda to show gasses \ntake two 1 liter bottles put them mouth to mouth cut a cap to connect them or pvc thredded tube @ hard ware store \nu can show how a hurricane moves thereb will be a" vortex " it is really cool to do \ntry this take a u shaped tube make 2 plungerlike inserts put water in it illustrate hydrodynamics dat all  good luck
440462
Try Oceanographer or Marine Biologist!
351412
i would love it if this was possible. seems like it would be if had enough hard working ppl in scuba gear