put word document into desired format that I gave out (document on homepage of wiki)
do another (the "real thing") experiment
discuss pretesting in the background or in the procedure section (e.g. what lead to your procedure being what it is)
DATA analysis - start getting to it soon (yoy will likely have to do some of this outside of class)
put into excel for the purpose of graphing?
keep hypothesis in mind (state it here):
independent & dependent variables:
1) List the 3-5 ideas you had (as bullet points) for the slow-motion camera, and what frame rate you in mind for eacm (e.g. 100fps):
1. Dry ice sublimation in water: 300 fps 2. Pressurized dry ice explosion: 700 fps (or greater) 3. Dry ice bubble pop (soap bubbles made with sublimated CO2 from dry ice): 300 fps (or greater)
New Project
Create a viscous liquid with corn starch and water Send viscous liquid through the strings of a tennis racket Hold racket so strings are parallel to ground and release liquid from above racket Film from directly beneath (camera is protected by transparent plastic) See if the liquid globs back together and analyze cohesive force Filming from a side angle... analyze the collision (momentum, density, viscosity) (300 - 700 fps)
New Project Version 2.0
-Take a long piece of copper tubing and drop a small magnet through the inside of it. -Magnetic induction would create an opposing magnetic field that will exert a force on the magnet and cause it to fall slowly toward the bottom of the tubing. -We could use one side view camera at 300 fps or lower to see the time it takes for the fall to occur and compare it to the time it would take the magnet to free fall from an equivalent height. -We could also get an estimate of the velocity of the magnet once it leaves the tubing by using a close up shot of the end of the tube at a higher frame rate ( 500+ fps) with a meterstick/ruler as a measuring tool. -In the end we can calculate how much work was done on the magnet by the magnetic current, and we may even be able to find things like the voltage created and the total increase in thermal energy of the pipe created by the electrical energy.
New Project Version 2.1
Elephant Toothpaste Reaction
- Mix 30% Hydrogen Peroxide with a Saturated solution of Potassium Iodide to a beaker/flask/graduated cylinder filled with a solution of water and liquid detergent. - Contents will shoot out of container rapidly as oxygen bubbles form during Hydrogen Peroxide decomposition. - One side view camera angle at 300-500 fps would let us determine the speed at which the contents shoots out of the container, and the acceleration of the foam as it travels the length of the container. - We could use this to find the force that pressure exerts upwards on the foam if we carefully mass the solutions and beakers before and after the experiment.
- For the second example we will determine the force needed to remove the cap by using a spark. We then can predict the pressure that would be needed inside the graduated cylinder to remove the cap. Once we have an estimated pressure force and we know the distance over which it will be acting, we can predict how high the cap will fly into the air using energy conservation. Does that sound logical? WARNING: The Iodine in the reaction may stain surfaces, and the reaction is exothermic and will get hot, so no touching.
- Graduated Cylinder - Rubber Stopper (cap?) - Spark to measure frictional force between stopper and graduated cylinder - Whiteboard with lines drawn on to use as a scale for measurments
Procedure - Use force sensor to determine what force must be exerted on the stopper for it to "pop out" of the tube - Put potassium iodide in the bottom of beaker. Volume is not very important as long as it is excess. The I- ion is only a catalyst of the reaction and is not used up in the process. - Pour in hydrogen peroxide (volume is dependent on the size of graduated cylinder) - Quicky put in the rubber stopper before the reaction begins - Hopefully this will happen... http://www.youtube.com/watch?v=x_2o-mxkeGc
- Use the marked whiteboard to determine how high the stopper/cap rises above the top of the graduated cylinder - Using energy conversion, determine the speed at which the stopper/cap left the graduated cylinder - Find the work done on the cap by the pressure force - Find the distance over which the force is acting on the cap - Determine the pressure in the graduated cylinder needed to pop off the cap - One thing we are not sure of is whether or not the reaction will occur when the cylinder is capped. Maybe the toothepaste will not form but gas still will, which would still work for the experiment.
New Project 2.2.3
Objective: To compare sling shots of different lengths/ widths, and to use high speed analysis to determine the most efficient and effective band for high-speed launching.
Materials - Three slingshots of varying widths or long elastic bands. Possible examples include:
- projectile ( small rubber ball ) - ruler/ meterstick
Procedure - load the sling and pull the band back a marked distance using the ruler. - shoot the sling and keep the shot in the frame at 500fps or greater - repeat the same steps with varying sling widths and at different pulled distances - Use the data to try and determine the force exerted on the ball from the bands, the work done by the bands on the ball, and the most ideal band for shooting projectiles at high speeds. -Also Determine whether the slingshots are hookean, which mean that the speed would vary linearly with the distance the slingshot is stretched.
Team Members: Connor, Diego, and Tafur Team Name: CONIEGOFUR
Wiki Link -
https://docs.google.com/document/d/1RdGCsFiICnYWKQq12VN68fRcj99hl4G-f9eR4aAEF2k/edit?usp=sharing
Natland Note (4/15/13):
1) List the 3-5 ideas you had (as bullet points) for the slow-motion camera, and what frame rate you in mind for eacm (e.g. 100fps):
1. Dry ice sublimation in water: 300 fps
2. Pressurized dry ice explosion: 700 fps (or greater)
3. Dry ice bubble pop (soap bubbles made with sublimated CO2 from dry ice): 300 fps (or greater)
New Project
Create a viscous liquid with corn starch and water
Send viscous liquid through the strings of a tennis racket
Hold racket so strings are parallel to ground and release liquid from above racket
Film from directly beneath (camera is protected by transparent plastic)
See if the liquid globs back together and analyze cohesive force
Filming from a side angle... analyze the collision (momentum, density, viscosity)
(300 - 700 fps)
New Project Version 2.0
-Take a long piece of copper tubing and drop a small magnet through the inside of it.
-Magnetic induction would create an opposing magnetic field that will exert a force on the magnet and cause it to fall slowly toward the bottom of the tubing.
-We could use one side view camera at 300 fps or lower to see the time it takes for the fall to occur and compare it to the time it would take the magnet to free fall from an equivalent height.
-We could also get an estimate of the velocity of the magnet once it leaves the tubing by using a close up shot of the end of the tube at a higher frame rate ( 500+ fps) with a meterstick/ruler as a measuring tool.
-In the end we can calculate how much work was done on the magnet by the magnetic current, and we may even be able to find things like the voltage created and the total increase in thermal energy of the pipe created by the electrical energy.
New Project Version 2.1
Elephant Toothpaste Reaction
- Mix 30% Hydrogen Peroxide with a Saturated solution of Potassium Iodide to a beaker/flask/graduated cylinder filled with a solution of water and liquid detergent.
- Contents will shoot out of container rapidly as oxygen bubbles form during Hydrogen Peroxide decomposition.
- One side view camera angle at 300-500 fps would let us determine the speed at which the contents shoots out of the container, and the acceleration of the foam as it travels the length of the container.
- We could use this to find the force that pressure exerts upwards on the foam if we carefully mass the solutions and beakers before and after the experiment.
- For the second example we will determine the force needed to remove the cap by using a spark. We then can predict the pressure that would be needed inside the graduated cylinder to remove the cap. Once we have an estimated pressure force and we know the distance over which it will be acting, we can predict how high the cap will fly into the air using energy conservation. Does that sound logical?
WARNING: The Iodine in the reaction may stain surfaces, and the reaction is exothermic and will get hot, so no touching.
Materials
- Saturated Potassium Iodide
- 30% hydrogen peroxide: http://www.flinnsci.com/store/Scripts/prodView.asp?idproduct=19489
- Graduated Cylinder
- Rubber Stopper (cap?)
- Spark to measure frictional force between stopper and graduated cylinder
- Whiteboard with lines drawn on to use as a scale for measurments
Procedure
- Use force sensor to determine what force must be exerted on the stopper for it to "pop out" of the tube
- Put potassium iodide in the bottom of beaker. Volume is not very important as long as it is excess. The I- ion is only a catalyst of the reaction and is not used up in the process.
- Pour in hydrogen peroxide (volume is dependent on the size of graduated cylinder)
- Quicky put in the rubber stopper before the reaction begins
- Hopefully this will happen... http://www.youtube.com/watch?v=x_2o-mxkeGc
- Use the marked whiteboard to determine how high the stopper/cap rises above the top of the graduated cylinder
- Using energy conversion, determine the speed at which the stopper/cap left the graduated cylinder
- Find the work done on the cap by the pressure force
- Find the distance over which the force is acting on the cap
- Determine the pressure in the graduated cylinder needed to pop off the cap
- One thing we are not sure of is whether or not the reaction will occur when the cylinder is capped. Maybe the toothepaste will not form but gas still will, which would still work for the experiment.
New Project 2.2.3
Objective: To compare sling shots of different lengths/ widths, and to use high speed analysis to determine the most efficient and effective band for high-speed launching.
Materials
- Three slingshots of varying widths or long elastic bands.
Possible examples include:
http://www.kmart.com/shc/s/p_10151_10104_089V003551096000P?sid=KDx01192011x000001&srccode=cii_17588969&cpncode=31-77160130-2
http://www.sportsauthority.com/product/index.jsp?productId=13342864&mr:trackingCode=8E77C32D-22F2-E111-BA78-001B21631C34&mr:referralID=NA&mr:filter=24486676791&mr:adType=pla&mr:ad=32400299151&mr:match=&mr:keyword=&{copy:iq_id}=&{copy:camp}=
http://www.uscargocontrol.com/Moving-Supplies/Moving-Straps-Mover-Bands/Rubber-Mover-Bands-27-1-Dozen
- projectile ( small rubber ball )
- ruler/ meterstick
Procedure
- load the sling and pull the band back a marked distance using the ruler.
- shoot the sling and keep the shot in the frame at 500fps or greater
- repeat the same steps with varying sling widths and at different pulled distances
- Use the data to try and determine the force exerted on the ball from the bands, the work done by the bands on the ball, and the most ideal band for shooting projectiles at high speeds.
-Also Determine whether the slingshots are hookean, which mean that the speed would vary linearly with the distance the slingshot is stretched.
RESOURCES