Materials+and+Procedure

- 4 different sized water bottles (3 of each size) - Bike tire pump - Masking tape- Altimeter - PVC pipe (varying in diameter depending on the bottle) - Ruler - Saw - Water from a hose - Open space (outside) - Another participant - Tape measure (only if needed) 1) Use the masking tape and tape around the end of the hose of the bike pump. Make sure that you taped it enough so that it can fit very tight inside of the nozzle of the bottles. (Do not leave the hose in the bottle just yet. Water still must be put in) 2) Use the saw to cut the PVC pipe (all diameter sizes) to be about 5 inches long (measured with the ruler) and cut a small hole in the side about an inch wide for the hose to be able to fit through (this will be used as a stand for the bottle rocket). See diagram below for an example of what this should look like.
 * Materials: **
 * __ Procedure __**
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3) Turn on and prepare the altimeter for use. 4) Using the garden hose, fill up the water bottle that will be launched to about 1/3rd of the way full. 5) Take the hose on the bike pump and put it through the hole in the side of the PVC pipe, going from the outside in. 6) Push the end of the hose into the nozzle of the water bottle so that it is tight. 7) Place the PVC pipe stand on a flat surface in an open space so that once the bottle is launched, it won’t hit anything. 8) Place the water bottle upside down on the PVC pipe stand. 9) Prepare to use the altimeter to either record the altitude in which the bottle rocket reaches, or record the angle that is formed from the ground to the person holding the altimeter to the bottle at its maximum height. 10) Between you and your partner, have one of you pump the bike pump and the other record with the altimeter. 11) Pump the bike pump until the bottle launches in the air. 12) Record the altitude at its maximum height by aiming the altimeter at the bottle until it begins to fall back down. 13) If you recorded the angle that was formed from the ground to the person holding the altimeter to the bottle at its maximum height, then use the equation tan //a// = (//x/////d//) to solve for //x//, with //d// being the distance between the person using the altimeter and the area the bottle was launched, //a// being the angle that was recorded and //x// being the maximum altitude of the bottle. (Use a tape measure to measure //d//). See the diagram below for an example. (Remember to use the same units of measurement for //x// and //a//)
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 //x//  // a // // d // 14) Repeat steps 4 through 12 (13 if necessary) with the same bottle, after you’ve retrieved it, about five times, and if the bottle gets ruined, use one of the others that are the same size. 15) Repeat steps 4 through 14 with every type of bottle that will be tested. 16) Remember to record the data. Type in the content of your page here.