proyecto science carlos

8/2/2019 Proyecto Science Carlos

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Hypothesis: The hypothesis of our experiment isthat temperature extremes (0 degrees C and 100degrees C) will reduce magnetic strength, whencompared to magnetic strength at roomtemperature (about 72 degrees Fahrenheit).

Materials: 5 magnets

40 steel washersFlat tray

StoveMetallic panAluminum thermometerSmall cooler with ice


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Procedure:

We counted out 40 steel washers and putthem into a small glass.

The day before the first magnet is placed inthe freezer (0 degrees C).

We measure the right temperature.

After, slowly pull the magnet straight upand count the washers that are attracted toit.

The second magnet is cooled (20 degrees

C)Again we measure the right temperature.We repeat step 4 pulling the magnet

straight up and counting the washersattracted.


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The third magnet is at room temperature(40 degress C)

We measure the temperature.Pull this magnet straight and again we

count the washers.The fourth magnet is slighted heated (75

degress C)We measure again the temperature.And after pulling the magnet straight we

count the washers attracted.The last magnet is heated for a little longer

(100 degress C)Measure the temperature.For the last time, we pull the magnet

straight and we count the washers.


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Results:The hottest magnet picked up all the 40

steel washers. The fourth magnetpicked up 33 steel washers. And theone with low temperature picked up just

22 steel washers.That is about 20% less than theunchanged magnet and almost two

times less than the hot magnet.


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Conclusions:

The strongest magnet was the hottest of the three

magnets concluding that temperature does affectthe strength of magnets. We found that freezing orheating magnets can increase and reduce thestrength of the magnet by about 10 to 20%.

Heating the magnet decreased the magnetsstrength the most because the hot magnet pickedup almost two times less than the frozen magnet.

When we did the experiment we found out that we

had to change some things on the procedure. Weremoved some materials and added the ones wefound we needed. Doing the experiment twice wefound the right information that was needed.


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It was observed that as the magnets

temperature was increased, the number of

washers picked up by the magnets is

reduced.

The hypothesis that increasing thetemperature of a magnet will reduce its

strength is proven to be true.


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Magnetism and magnets have found many uses in

products that we use daily. The once popular cassette

and video tape were made using a reel of magnetictape. Our ATM cards and credit cards have a magnetic

strip which contains information. Magnetism is also

used in transformers, motors, speakers, microphones

and many more devices. Hospitals use Magnetic

Resonance Imaging (MRI) to identify problems in

patients, without having to perform surgery.


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MEMBERS OF THE GROUP:

Jos Carlos Reyes RubCarlos Enrique Hill Moz


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proyecto science carlos

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