how to make flying machine using balloons and baking soda?
113492
how are we supposed to show pictures on here?
450016
Hi\nYou can just use a simple plastic water,drink or juice bottle.\n\nIMPORTANT NOTE:your rocket may not work if you use a screw lid.\n\nTo make rocket:\n1 Tape a straw to the side of the bottle:make sure that one end of the straw is within 1-2cm of the top of your bottle\n\nTo make launch pad:\n1 Insert skewer into a round piece of cardboard so that the skewer is standing securely upright.\n\nTo launch rocket:\n1 Insert one of the following fuels:\n   1x crushed alka-selzer tablet and 15ml of water \n   1 teaspoon of baking soda and 40mL of vinegar.\n2 Then put on the lid on as soon as the substance(s) are in the rocket.\n3 Place rocket on launch pad so that the skewer goes through the straw.\n4 watch in amazement as your rocket takes off!
172574
AP Physics is phun, dont let anyone tell you otherwise.\n\nFirst, find the volume of the balloon.\nThe volume of a sphere = 4/3 pi * r^3\nyou are given the radius, so this should be no problem.\n\nOnce you know the volume of the balloon, find how much Helium and air it would take to fill it.\nYou could do this two ways, (the Physics way or the Chemistry way) either by using the molar masses of the gasses....or using the densities of the gasses, the density way is probably easier, but you either need to have those given to you or you can look them up and assume what temperature the experiement is taking place at.\nYou need to find the masses of each of the gasses.\n\nThe lifting force of the balloon will equal the difference in the upward and downward forces acting on it.  The downward force is the force of the Helium's weight, the upward for is the weight of the air that the balloon is displacing (we ignore the weight of the ballooon).\n\nIf you want to believe wikipedia,\nthe density of air at 20 degrees C = 1.204 kg/m^3,\n\none mole of Helium = 4.00 grams.\nAt STP 1 mole of Helium would have a volume of about 22.4 Liters.
941395
I had to do this before, but I had to make mine out of candy. If you're allowed to do that, use candy. It's pretty easy. Just get some wire, twist them to the right shape, and use different kinds of candy on them. Once you have those up, then you'll need the wires that go across to connect them. I find that candies like twizzles and gummy worms work well. It shouldn't take that long to make. Good luck!
694414
Search on the Internet for a book and a supply of special balloons that you can order. The Qualatex company makes balloons for making animals.\n\nYou will also need a special pump to inflate the balloons, unless you have super-powerful lungs. (I can blow one up if I really, really work at it, but it's not worth it. Buy the pump. The best kind of pump is a small one with a bulb that you squeeze. A cheaper, less satisfactory pump requires you to hold it in both hands and push it in and out.)\n\nGood luck to you! Kids love it when you make balloons for them.
185600
How to make a simple Van de Graaff Generator\n\nITEMS:\nPlastic Tupperware (microwave oven safe)\nSome wires\nNail\nSmall DC motor \nPiece of PVC pipe (approx. 3.8 cm in diameter)\nBroad rubber band \nWooden skewer\nPlastic bag\nRoll of tape\nSoft drink can\nMineral water bottle\n2 3volt batteries\nBattery holder (optional)\n\nPutting it together:\n1) Cut a hole in the middle of the bottom of the plastic container.\n2) Glue/tape the motor to the lid, making sure the shaft is at the centre of the lid.\n3) Using a hot nail (can be heated at the stove), make two holes near each other for the wires of the motor\n4) Thread the wires through the two holes (the two wires will connect to the batteries)\n5) Cover the container with the lid. (Inverted container in this case)\n6)Make another hole, perpendicular the motor shaft\n7) Thread another wire through(this will be your ground wire) \n8) Make the appropriate measurements for cutting your PVC pipe length and grooves(where the stick will rest)\n9) To make the roller, just stick tape to your stick and go round and round and round.\n10) Place the PCV tube on the lid, perpendicular to the motor. \n11) Thread the stick thru the rubber band and place it in the grooves.\n12) Make sure both rollers are parallel to each other when you thread the bottom of the band to the other "roller"\n13) Cut the top of the soft drink can.\n14) Cut both ends of the mineral water bottle off, making sure that it isn’t shorter than the PVC pipe.\n15) Make a hole near the top of the bottle.\n16) Strip some wire, twist it, and poke it through the hole.\n17) Electrically connect the copper wire to the soft drink can.\n18) Tape everything in place.\n\nWhen you put everything together, you get a crude Van de Graaff generator. Make sure the combs (end of wires) are near the belt and rollers. Make sure that when you run it, the belt doesn't slip off. If it does, make sure both rollers are parallel to each other. Also, try to superglue the motor to the Tupperware lid.\n\nWhen you first run it try taping strips of tissue paper to the can. It should start to rise seconds after the batteries are connected. If this fails, put your finger near one of the tissue strips. The strip should be attracted to your finger.\n\nPlaces with high humidity can be a real problem for electrostatic experiments. Try working in an air conditioned room to help overcome the problem.\n\nThe last two links are the best ones and both include detailed step by step process with pictures.
162791
These are instructions for making non-toxic invisible ink using baking soda (sodium bicarbonate). \nDifficulty: Easy\n\nTime Required: A Few Minutes\n\nHere's How:\n1.   There are at least two methods to use baking soda as an invisible ink. Mix equal parts water and baking soda.\n\n2.   Use a cotton swab, toothpick, or paintbrush to write a message onto white paper, using the baking soda solution as 'ink'.\n\n3.   Allow the ink to dry.\n\n4.   One way to read the message is to hold the paper up to a heat source, such as a light bulb. The baking soda will cause the writing in the paper to turn brown.\n\n5.   A second method to read the message is to paint over the paper with purple grape juice. The message will appear in a different color.\n\nTips:\nIf you are using the heating method, avoid igniting the paper - don't use a halogen bulb.\nBaking soda and grape juice react with each other in an acid-base reaction, producing a color change in the paper.\nThe baking soda mixture can also be used more diluted, with one part baking soda to two parts water.\nGrape juice concentrate results in a more visible color change than regular grape juice.\nWhat You Need:\nBaking Soda\nPaper\nWater\nLight Bulb (heat source)\nPaintbrush or Swab\nMeasuring Cup\nPurple Grape Juice (opt.)\n\n\nBaking Soda Volcano\n\nOkay, the baking soda volcano is the kitchen equivalent of a volcano, not a real one. It's cool all the same! The baking soda volcano is also more or less non-toxic, which adds to its appeal. \nDifficulty: Average\n\nTime Required: 30 minutes\n\nHere's How:\n1.   First make the 'cone' of the baking soda volcano. Mix 6 cups flour, 2 cups salt, 4 tablespoons cooking oil, and 2 cups of water. The resulting mixture should be smooth and firm (more water may be added if needed).\n\n2.   Stand the soda bottle in the baking pan and mold the dough around it into a volcano shape. Don't cover the hole or drop dough into it!\n\n3.   Fill the bottle most of the way full with warm water and a bit of red food color (can be done before sculpting if you don't take so long that the water gets cold).\n\n4.   Add 6 drops of detergent to the bottle contents.\n\n5.   Add 2 tablespoons baking soda to the liquid.\n\n6.   Slowly pour vinegar into the bottle. Watch out - eruption time!\n\n7.   Chemistry is Cool :-)\n\nTips:\nThe cool red lava is the result of a chemical reaction between the baking soda and vinegar.\nIn this reaction, carbon dioxide gas is produced, which is also present in real volcanos.\nAs the carbon dioxide gas is produced, pressure builds up inside the plastic bottle, until the gas bubbles (thanks to the detergent) out of the 'volcano'.\nAdding a bit of yellow food coloring too will result in a lovely lava red-orange!\nWhat You Need:\n6 cups flour\n2 cups salt\n4 tablespoons cooking oil\nwarm water\nplastic soda bottle\ndishwashing detergent\nfood coloring\nvinegar\nbaking dish or other pan\n2 T baking soda
6350
If it has an air bubble then tie a string around the upper end and whirl it around over your head.  The force should make the bubble rise.
849450
Try this...Take a square piece of paper and fold it into a triangle.  Now fold a series 1/4 folds (3 or 4) on the wide end.. then insert one end into the other (if it doesn't stay then use a small piece of tape to hold together)  What you will have is a cylinder type of craft.. to launch it hold it by the tail (the tip of the triangle) with your middle finger on the inside and all others on the outside... The position should be that the most paper should be facing down\n\nNow just flick you wrist and let go... if you did it correct you will have a futuristic paper air plane that will fly further than most conventional ones..
1136054
Volcano is the classic answer.  Make a volcano out of clay and add some baking soda, vinegar, and red food coloring for the eruption.  You could use styrofoam balls from walmart or a craft store along with doll rods or straws to make a model of the solar system or an atom.  The links below are to some websites that have samples of some projects you could do.  If you tell me a little more specifically what kind of project you want, I could help more.
317575
This is actually pretty easy.\n1) Take a 2 liter bottle and poke a hole in the cap (with a sharp knife or philips head screwdriver) just a bit smaller than the diameter of a straw.\n\n2) Get a straw and force it through the hole in the lid. The straw should be made out of a fairly strong substance.... perhaps like a curly straw. The curly straws actually have straight sections. If the straight section is at least 3 inches long, it should work to go ahead and cut it. If the straw jams too tightly in the lid, it will obstruct the flow so just cut the hole slightly bigger until you get the right fit. We just want the straw to fit REALLY snug.\n\n3) position the straw so only a small length of it is pointing out the bottom of the cap (the longer portion should be sticking out of the top of the cap acting as a nozzle). Once the straw is placed, you could use a little epoxy or tape just to keep it from coming out.\n\n4) Get a small water balloon. Lower it into the opening of the bottle but DON'T LET IT FALL IN!!!!  While holding the opening of the water balloon above the opening of the bottle (with the rest of the balloon hanging inside the bottle), fill the balloon with vinegar so that it takes up about half the volume of the bottle. Once this is done, tie off the top of the water balloon and let it drop into the bottle. You may want to hold the bottle on it's side so the balloon doesn't smack the bottom of the bottle. Then slowly tip the bottle back up.\n\n5) Now, carefully fill the remaining space in the bottle with baking soda. (we don't want the balloon to pop YET)\n\n6) Put the lid back on the bottle and stick a piece of chewed gum just barely in the outside opening of the straw. This will preserve the baking soda by not letting any excess moisture in while the fire extinguisher is not in use. Make sure that the gum is not in too tightly or too far as we want to be able to remove it quickly.\n\n7) You are done!!!!! To use it just remove the gum and smack the bottle on a hard surface so the balloon breaks inside the bottle. When the balloon breaks, the vinegar and baking soda will mix, react, cause pressure, and the pressure will be released through the straw and in the direction that you point the fire extinguisher  : )\n\nHope this helps\nThanks\nJon
618509
fill water balloons with different amounts of water and drop them at the same height to see if they fall differently.  =)
60647
Vinegar reacts with the baking soda for the eruption to be effective. She's right.......use red food coloring. Did you already build the paper mache volcano? Have fun exploding!
182023
take a drawing block and fold it into a big aeroplane and tie the puppet to it. the paper would be strong enough to carry the puppet over the pool.
500012
make a catapult or a trebuchet\nmake a lever\nmake a hydraulic lift ( soda bottle hosing balloon housing for balloon like a box or can, something to lift}
7169
You could make a cloud chamber. It's a chamber that's saturated with alcohol vapor so when a cosmic ray or radioactive particle enters the chamber it leaves a trail of mist like when a plane leaves a vapor trail. It does use dry ice and isopropyl alcohol though. It's kind of complicated but would be worth it in the end. You might even win depending on the competition.
684804
use bicarbonate of soda,its short term though