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Transcript of Ferrofluid Project
Ziwen Huang Background Info How does a magnet affect Ferrofluid? In this experiment, we will be using a substance called ferrofluid to determine how magnets affect it.
Ferrofluid is a fluid containing a magnetic suspension which becomes strongly magnetized when it is present of a magnetic field. What changed? Works Cited: Home made Ferrofluid After receiving our feedback from the proposal, we came up with another way to test out ferrofluid. At first we were going to test it out with one magnet and then we came up with an idea to test it with two different magnets. These two magnets have a different amount of magnetism.
Another thing we have changed about our experiment is to make homemade ferrofluid due to the cost.
The last change would be our hypothesis. The Experiment In this experiment, we will be testing how magnets affect ferrofluid. In our first trial, we will conduct how two different magnets react with ferrofluid. However, in our second trial, we will see how ferrofluid reacts with water. In order for us to conduct this experiment, we will need to make ferrofluid first. These are the materials we will be using to make it. Compact Cassettes
Two Large bowls
Vegetable oil Trial One: Trial Two: Data Table What we
think will happen: Hypothesis - Materials: Step 1: Step 2: Step 3: FERROFLUID! Steps: Break the cassettes and remove the magnetic tape and unravel. Place the unraveled tape in to one of the large bowls and submerge with acetone. Leave for a hour allowing time for the acetone to dissolve the tapes coating. Decant the acetone solution into the second
bowl. Push the neodymium magnets into a balloon and swirl through the acetone solution. The ferric oxide will be attracted to the magnet and form a brown sludge on the outside of the balloon. Collect the brown sludge by removing the magnet from the balloon. This can be achieved by cutting the top of the balloon off and inverting. This method will also prevent any get the sludge on the magnet. When we drop droplets of ferrofluid into the glass of water, the liquid will drop to the bottom of the cup that will instantly form small black balls. From there, we will press the magnet to see if we can achieve the same look in trial one. However, once this happens, the ferrofluid will quickly react to where the magnet is being held. Just as in the the first trial, the ferrofluid will turn into a solid with the spikes. If you drag the magnet around the glass, the ferrofluid will remain in contact with the metal - never leaving its magnetic field. We will then repeat this with the second magnet. For this trial, the ferrofluid will react the same way to the second magnet since it is much weaker than the neodymium magnet. 1st Trial - Once ferrofluid is present of a magnetic field, we can visualize magnetic fields. For instance, if you take a screw that is magnetic and drop ferrofluid onto the screw, the ferrofluid will instantly become a solid that looks like spikes. If we do this for the neodymium magnet first, it will hold its position well since the magnetic field is stronger. If we do this for the permanent magnet which is more like a magnet on a refrigerator, then the liquid will not hold up as well since the magnetic field is not as strong. 2nd Trial - Variables The one factor that we will vary is the two magnets to determine the outcome of what will happen when we experiment with the ferrofluid. Constant variables - Control group - In trial one we are going to try visualizing magnetic fields with the two magnets. The two magnets we will be using is the neodymium and permanent magnet. With these two magnets, we want to determine if the strength of the magnetic field would be the same or if it would different. Neodymium Magnet In trial two, we will determine how ferrofluid reacts with water. Will ferrofluid still be able to recognize the magnetic field while in water? This shows that ferrofluid is still able to recognize the neodymium magnet while in another solution. This happens because the magnetic field is very strong therefore the ferrofluid can sense it. On the other hand, the permanent magnet may not have a stronger magnetic field just like the neodymium magnet. We believe that the ferrofluid may recognize the magnet, but not come up the same way as the neodymium magnet. "Ferrofluid Fun." N.p., n.d. Web. 13 Mar. 2013.
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"What Is a Ferrofluid?" What Is a Ferrofluid? N.p., n.d. Web. 13 Mar. 2013.
"What Is Magnetic Ferrofluid Used For?" Base Articles. N.p., n.d. Web. 13 Mar. 2013.
"UCSB Science Line Sqtest." UCSB Science Line Sqtest. N.p., n.d. Web. 13 Mar. 2013. Our control group is the ferrofluid because it changes from a liquid to a solid when it is present to a magnetic field. This is the data table we will be using to help us keep track of our trials. In both trials we will use the same amount of ferrofluid so that it stays constant. The surface area of the ferrofluid is used to measure the "spikes" the ferrofluid gives off. The constant variable in our project is the water and the two magnets that we are using. The water is a constant variable because it doesn't change even if you put the ferrofluid in with the water; The water is still water. The two magnets are a constant variable because it doesn't change. If we drop the magnets into ferrofluid the ferrofluid will instantly cover the magnet, but that doesn't mean the magnet will change in any shape or form. Permanent Magnet We believe that when ferrofluid is in contact of a magnetic field, it will become into a "spike" form whether its a strong magnet or not.
We also believe that when ferrofluid is put into water, it will still be able to be in contact of a magnetic field. Materials for this project: Homemade ferrofluid
Gloves (ferrofluid can dye your skin!)