Need a mathematical explanation of how bubbles work (for a middle school project)?
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see\nhttp://hyperphysics.phy-astr.gsu.edu/hbase/surten2.html#c1\n\n here you can find the answer for your question with MATHEMATICAL EXPLANATIONS.
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you could porb try an internet site like howstufworks.com
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The following link is a pdf slide show that gives examples of buoyancy calculations and theory of floating objects.\n\nhttp://www.colorado.edu/physics/phys1010/phys1010_fa05/lectures/class12-09-29.pdf
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Popcorn ball. . . . \n\nGoogle search:  volume sphere (should have used "volume sphere," but it turned out not to matter)\n\nhttp://www.aaamath.com/geo79-volume-sphere.html\n\n4/3 (pi) r^3\n\n4/3 times pi times (6 to the 3rd power) \n\nequals 4/3 times pi times 216. . . and work from there.\n\nGoogle search:  volume cylinder\n\nhttp://www.321know.com/exp79_x5.htm\n\n(area of the base) * height =(pi r squared times height)\n\nPi times (16 squared) times 275. . . work from there.
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Cover one end of your garden hose with clear plastic (like Saran Wrap) and wrap rubber bands around it to hold the plastic in place.  Then remove your garden hose from the faucet and cover the faucet end of the garden hose with plastic wrap and use rubber bands to hold that in place as well.  Lay down the garden hose over a relatively flat area of the ground where you wish to determine level elevation.  Then look at each end for air bubbles.  (Make sure the garden hose isn't draped over a hill, or this procedure won't help.)\n\nIf you find air bubbles at one end of the hose, it means that end is at a higher elevation than the other.  Move the bubble end of the garden hose, without moving the other end until the bubbles leave the plastic.  Then check the other end of the garden hose.  If you find bubbles, move that end only until the bubbles leave the plastic.  \n\nRepeat this procedure until you don't see bubbles at either end.  That is when the ground is level along the length of the garden hose.
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use the idea that \ntime/ work  rate = (1) job\nfor instance,,,,,the hot water takes 4 min to fill a tub\n1/4 * time = 1 job\nin one hour...1 * 1/4 --> 1/4 full\nin 4 hours...4 * 1/4  --> 1 tubfull\n\ntherefore the formula would look something like this\n\nt/4 + t/3 = 1\nmult by lcd\n3t + 4t = 12\nt = 12/7\nt= 1/ 5/7 min
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E-mail me if you want a detailed step-by-step explanation. Illustrations extra..... :)
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Take a balloon and blow it up partially.  Weight the balloon and submerge in a beaker of water (so it doesn't float).  Gently warm the water with a burner or hot plate.  The balloon will get bigger as the water gets warm.  Then you can remove and submerge into ice water to see it shrink.\n\nThe volume of a gas is directly proportional to the temperature of the surroundings.\n\nAnother idea: Fill the bottom of a pop can with water.  Heat the can using a hot plate.  Allow time for most (but not all) of the water to boil away into steam.  Using tongs, pick up the can and place in ice water.  The can will collapse!  For a louder effect, use an old metal gas can.
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Make Bubble solution\n\nDifficulty: Easy\n\nTime Required: 10 minutes plus rest time\n\nWhat You Need:\n1/2 c. dishwashing liquid\n4 1/2 c. water\n4 T. glycerin\nlarge covered container\nbubble wands\n\n\nHere's How:\n1.   Combine 1/2 cup dishwashing detergent, 4 1/2 cups water, and 4 tablespoons of glycerin in a large container with a cover.\n\n2.   Mix well, then allow the mixture to rest, covered, until ready for use.\n\n3.   Pour bubble solution into a shallow container. Dip bubble wands -- such as cookie cutters, shaped pipe cleaners or wire -- into the solution and blow!\n\n\nTips:\nJoy is usually the recommended brand of dishwashing liquid.\nFor best results, use distilled water.\nAs an alternative to glycerin, some recipes recommend using white corn syrup.
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If you take seven pennies and lay them out flat, then bunch them up, you will see that with one penny at the center, exactly six pennies will fit around it.  In the case of bubbles, if you have several bubbles of the same size, they will natural fall into a position that allows them to fit most tightly together.  Bubbles on top layers will either pop or fall into gaps, and this will continue until the tightest packing is acheived.  For round bubbles, this will be the sort I described.  Put a whole bunch of pennies flat on the counter, and pack them as near together as possible without over-lapping--you'll eventually find that every penny (except those on the edge) is touching six other pennies.\n\nNow with bubbles, the sides of each bubble will merge with that of those it touches in order to reduce surface tension (a thermodynamically unfavorable association between different phases, like water and air in this case).  That merging means that while each bubble will be touching six others, the sides will all be flat.  Now each of your bubbles represents a packed hexagonal structure.
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Place a drop of water on horizontal glass plate gently.\n\nContrary to our expectation that the contact area should be a perfect circle, the area will have an irregular area.\n\nIf we clean the glass thoroughly and repeat the experiment we can see that the area is some what circular.\n\nThis shows that only if the glass plate is perfectly clean and has a perfectly plane, t surface (with out any surface waviness) the area of contact will be circular.\n\nThe surface tension between the glass and water makes the surface of water to be at an angle called angle of contact.\n\nIf the glass contains impurities and if the surface is not perfectly plane  then the angle of contact will not be uniform and constant and hence the area of contact is of some irregular area.\n\nIn a vertical window pane, the gravity pulls the water drop and and at each point of contact, the surface tension prevents the pull at different angle due to the variation of surface tension at each point due to impurities and surface waviness.\n\nThe water moves along the resultant force which is not uniform. \n\nThis is the reason that the water is not moving straight down.\n\nIf the water goes almost straight down we can conclude that the glass is almost clean.
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Besides a tasty treat for the physicists...\n\nThe effervescence of the bubbles has been pondered by many a physicists.\n\nhttp://www.stanford.edu/dept/news/relaged/911111Arc1079.html
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Here is the answer:\nhttp://www.slide.com/static/howworks
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If you have lots of time...\n\nweigh the soap bubble mix\n\nblow some bubbles - make sure you count them all.\n\nweigh the mix again.\n\nFind the weight that you used. (first weight minus second weight)\n\nDivide the weight of the mixture used by the number of bubbles.\n\nThat's the (average) weight of one bubble!\n\nAlternatively you could use a very accurate balance and catch a bubble on it.\n\n\nTo make nice bubble making liquid...\n\n1 General purpose formula: \n2/3 cup dishwashing detergent \n1 gallon water \n2 to 3 tablespoons of glycerin \n\nAnother general purpose formula: \n100 g sugar \n2 to 3 tablespoons salt \n1.4 L water (distilled water is better) \n150 ml dish washing detergent \n12 ml glycerin \n\nYet another general purpose formula: \n1 part of washing-up detergent \n2 parts of glycerin \n3 parts of water \n\nFor long living bubbles: \n1/3 cup commercial bubble solution \n1/3 cup water \n1/3 cup glycerin \n\nFor no-tears soap bubbles: \n60 ml baby shampoo \n200 ml water \n3 tablespoons corn syrup\n\n\n++++++++++++++++++++++++++++++++\n\nI eventually found the answer.... 1.3 mg \n\n++++++++++++++++++++++++++++++++\n\n(see the second link)
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A classic, but great visual experiment is sucking a hard boiled egg into an erlenmyer flask. It is done by using the principles of the kinetic theory of matter.\nAnother cool project might be doing something with dry ice. Find a place that you can get dry ice and do fun stuff with it, like create smoke, put bubble solution in water and then drop in dry ice to make bubbles that, when you pop, let out white smoke.\n\nAnother idea might be to do some cool colorful reactions. Make some dye molecules or something.\n\nHope one of these ideas works for you.
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Take some balloons and blow them up and watch them slowly lose the air in side over a few days.  Then explain what Osmosis is.   : )   While you have the balloons out fill some with helium and show the kids how they can make their voices change.  Have your video camera ready this will be a hoot!!!
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First mould a volcano with plastercine or play dough.\n\nThen fill it with bicarbonate of soda, baking powder or health salt.\n\nGet some vinegar and then mix it with reddish-orangey (Lava colour) ink or food colouring.\n\nThen pour your coloured mixture with the bicarbonate of soda, baking powder or health salt in the volcano.\n\nHey Presto! The bubbles should start to rise. \n\nWhen Bicarbonate of Soda is mixed with an acid liquid (Vinegar)it releases the gas carbon dioxide (CO2): \n\nNaHCO3     +     H+     ----->     Na+     +     H20     +     CO2\n(soda)         (acid)           (sodium)       (water)        (gas)\n\n^ Above is the word equasion. If you are good at science you might be able to understand this.\n\nI hope I helped you.