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 Replies: 31 / Views: 5,230 |
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Pillar of the Community
United States
4846 Posts |
does anyone have any ideas? I was going to do the effects of coin cleaners, buy Bad thads Verdi-CareTM and use water and a home remedy, but my teacher said that was too basic. so anyone have any complex ideas?
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Moderator
 United States
6563 Posts |
Specific Gravity good luck  Moved to Main Coin Forum |
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Pillar of the Community
United States
7123 Posts |
Specific gravity based on wear is a great Idea.
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Pillar of the Community
 United States
4846 Posts |
i dont think I have the equipment for that...
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Valued Member
United States
335 Posts |
Coinman1014 is planning to do a project in which he artificially tones some coins.
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Pillar of the Community
United States
4846 Posts |
i think artificially toning coins is still too basic.
UGH! I hate 7th grade!!
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Pillar of the Community
United States
1080 Posts |
What about safe methods of storage? Pick different storage options and expose to heat or humidity or something and look for changes. Maybe contrasting zinc cents with copper cents. Bury each in potting soil for a week and see the holes in the zinc (I don't know if anything really would happen that quickly). How about conductivity of coins from various countries? I would think various methods for treating verdis gris would be cool. Dunno why your teacher said it was too basic. Test different solvents - acetone, xylene, Bad Thad's, etc. What about restoring dates on Buffalo nickels with muriatic acid? |
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Pillar of the Community
United States
7123 Posts |
Check it out adam, You may be surprised at how simple the equipment is to measure the weight by specific gravity, keep in mind this was done back in the day when I was young. LOL
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Pillar of the Community
United States
4000 Posts |
I agree that it's a bummer that the teacher is not allowing the conservation of a coin. But, I also agree that a specific gravity test would be a cool experiment. You're bound to need to do it again someday!  |
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Pillar of the Community
United States
4846 Posts |
ill do some research on how to find specific gravity...thanks!
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Bedrock of the Community
United States
19935 Posts |
* An electrolysis experiment would be cool and easy to do. As a twist, you could put a potentiometer in line so you can control the current. Lots of good science going on in the experiment, chemistry and electronics.
* If you have access to an analytical balance, you could measure the amount of patina on a coin. Simply weight circulated cents, soak in nitric acid just long enough to remove the patina, then reweigh. You could discuss the composition of the brown layer and why it is removed. If you have access to an FTIR at school, you can scan the residue and explain what it is.
* You could take the VC experiment farther by showing a lot of different cleaning methods and their results, i.e. dipping in an acid-thiourea solution, soaking in vinegar, water, Tarn-X, etc. Then explain the chemistry behind each method.
Lincoln Cent Lover!VERDI-CARE™ INVENTOR https://verdi.care/
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Pillar of the Community
United States
4846 Posts |
you just lost me. I'm not smart enough to figure out what that means, lol. if I do a specific gravity test, ill be asking a lot of questions here on CCF
remember, I'm not in high school or college, I cant get my hands on any special scales, scanners, ect.
the best I can do is a triple beam balance.
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Pillar of the Community
United States
564 Posts |
When I was in middle school years and years ago, I grew plants using different liquids. If I were you, I would do something like that because you don't have the required equipment to test and weigh coins which you would need to see testable results. I would keep it easy and spend your extra time on your hobby... Coins. It's nice to do stuff you like at school but sometimes you have to do what it takes to learn the science process to do what you really want in the future. I'm not trying to put your idea down but rather explain you got to learn the basics to accomplish your goal. Good luck!
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Bedrock of the Community
United States
14454 Posts |
in the 8th grade my son and I did his science fair project about how wind can be converted to energy. We build a house and wired it up with small Christmas lights and built a wind mill that would power the house. We went a few steps further to where it would store the energy in some rechargeable AA batteries and also put an external engine on the propellers that took a small amount of energy to turn the propellers and hooked that to a solar panel and it put out twice as much energy as went in so even if there were no wind you could still have power. We were just going to do solar and wind hooked to the house but the solar panel wasn't big enough to generate enough power so with the help of the windmill it was. He had to use a volt meter to show what was going in to the small engine from the solar panel and what was coming out of the windmill to show it was putting out more than was going in but it went over well with the state judges. he is in an advance School and this was at the state fair and was judged with others from the whole state not just his School. I know this isn't coin related but may give you another idea even though it definitely wouldn't be in the "easy" category it would be something that may make them say you actually did your work to get everything right
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Pillar of the Community
United States
4212 Posts |
Adam, some neat stuff if you do the goog for "coin science expierements"
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Bedrock of the Community
United States
20753 Posts |
A simple method to weigh the difference in some Cents. You would need a few Cents (pennies) dated prior to 1982 and some dated post, after, 1982. Now you need a standard six sided pencil, glue, popsicle stick (without the popsicle stuff on it). With this you now can make a balance scale. Take the pencil, balance a popsicle stick on one end and when balanced, add a drop of glue to secure it in place. Lay on a flat service, place a pre 1982 cent on one far end of the stick. Place a post 1982 Cent on the opposite end of the stick. A six sided pencil is easier to balance but a round one will do also. Note: If you placed a pre 82 on one end, the other end with the post 82 stays on the flat surface. If you placed a pre 82 on one end by itself, it drops to the flat surface. Then add the post 82 to the other side and it will now drop to the flat surface showing it is heavier. You have now invented a really cheap, easy to use, balance beam scale. You could use an Ice Cream stick also but you must remember to eat all the Ice Cream first. Also, note if you had a copy of the Red Book on coins you could look up the weights of other types of coins and do the same with those. For example if you had a Washington quarter dated prior to 1965 and one dated after there is the same differences in wieghts. Pre 65 is 6.25 grams, post 65 is 5.67 grams. Also, you could use this same procedure to show how an excessively worn coin has lost weight if you compare it with one with little to no wear. Edited by just carl
10/03/2010 11:00 am
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Replies: 31 / Views: 5,230 |
Posted 10/02/2010 11:43 pm
