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knibloe
1000+ Penny Miser Member
USA
1066 Posts |
 Posted - 06/25/2008 : 10:39:21
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This thread is an attempt to prevent the complete hijacking of one of Lemon Throwers threads.
I bought a bag of pennies from a bank the other day. They said it was $100. I weighed it when I got home. 59.2#.
I figure a bag of pure zinc would weigh 55# That means that there are 4.2# additional = 1907 grams divide by .61 grams (additional weight of a copper penny) = 3125 copper pennies in the bag. That would be 31.25%
Am I right on this?
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Edited by - HoardCopperByTheTon on 06/25/2008 20:51:20 |
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HoardCopperByTheTon
Administrator
USA
6807 Posts |
Posted - 06/25/2008 : 10:52:45
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I think you are in the ballpark.. but I might come up with a slightly different copper estimate. Maybe we should have a contest for members to guess the final copper count of the bag. Do you have an accurate counter for the final tally? I would be willing to put up an Indian as a prize for the closest guess.
How accurate is your scale?
Is it a canvas bag or a plastic coin shipment bag?
Let me know if you want to do a contest.  |
If your percentages are low.. just sort more. If your percentages are high.. just sort more.
Now selling Copper pennies. 1.6x plus shipping. Limited amounts available. |
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JerrySpringer
Penny Hoarding Member
669 Posts |
Posted - 06/25/2008 : 14:11:12
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| I think you can set up one of those two variable, two equation matrix and solve for the copper count pretty fast. Maybe that is what the original poster did. If you know that the exact count of pennies ( ~ 10,000) and have the weight of the bag and exact weight of a copper penny and a zinc one, what do they call that , a set of simultaneous equations? It has been a few years since I did my college math. Anyway, if there is a quick formula table to use, it could be handy weighing bags in teh field. Of course, the heavier the better -ie- more copper and less zinc. |
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fb101
Administrator
USA
2856 Posts |
Posted - 06/25/2008 : 14:15:37
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I ran through a home made calculator and came up with 7490 zinc and 2510 copper +/- 3% assuming the scale is correct and the face value is correct.
Good luck. Contest or no, I'd like to know if possible how close I was or wasn't.
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natsb88
Administrator
USA
1850 Posts |
 Posted - 06/25/2008 : 14:24:37
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quote:
Originally posted by JerrySpringer
I think you can set up one of those two variable, two equation matrix and solve for the copper count pretty fast. Maybe that is what the original poster did. If you know that the exact count of pennies ( ~ 10,000) and have the weight of the bag and exact weight of a copper penny and a zinc one, what do they call that , a set of simultaneous equations? It has been a few years since I did my college math. Anyway, if there is a quick formula table to use, it could be handy weighing bags in teh field. Of course, the heavier the better -ie- more copper and less zinc.
Copper = C
Zinc = Z
C + Z = 10,000
3.1C + 2.5Z = 26852.6683
C = 10,000 - Z
3.1(10,000 - Z) + 2.5Z = 26852.6683
Z = 6912.2
C = 10,000 - 6912.2
C = 3087.8
30.8% copper |
Nate
The Copper Cave
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natsb88
Administrator
USA
1850 Posts |
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HoardCopperByTheTon
Administrator
USA
6807 Posts |
Posted - 06/25/2008 : 16:31:22
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| Nothing is ever exact. There is wear on the pennies, so they won't be full weight. |
If your percentages are low.. just sort more. If your percentages are high.. just sort more.
Now selling Copper pennies. 1.6x plus shipping. Limited amounts available. |
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CoinHunter53562
1000+ Penny Miser Member
USA
1805 Posts |
Posted - 06/25/2008 : 17:26:51
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| Only one way to find out! Put that Ryedale to work! |
My hobby: collecting real money 1 copper cent or nickel at a time.
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Flbandit
Penny Hoarding Member
USA
851 Posts |
Posted - 06/25/2008 : 17:41:54
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| Um, straight out of the clouds, I'd say you get 30%! |
Are you throwing that out? |
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HoardCopperByTheTon
Administrator
USA
6807 Posts |
Posted - 06/25/2008 : 20:27:58
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OK.. I swapped PM's with knibloe and he agreed to do all the hard work if we have a contest. So here it is:
This is a 3 way contest.. 3 chances to win, but a limit of one prize per person.
An Indian head penny will be awarded to the winner of each contest. The winner can choose to have the Indian shipped directly to them, or I can ship it to TenBears to store with your silver.
Contest 1 - # of copper cents in the $100 bag.. this includes wheats and canadian copper.
Contest 2 - # of wheat cents in the bag
Contest 3 - # of Copper Canadian cents in the bag (steels and zincs don't count)
Tie breaker on the last 2 will be your guess in the alternate small count contest. Second tie breaker if still tied will be your guess in the big count contest.
One set of guesses per person.
No editing your guess after initial posting.
Limit of 1 prize per person. If you win more than one you get bragging rights but the second prize goes to the next best guess.. this way we can have more winners.
Your guess on the total copper count should be unique.
Your guess on the other 2 contests can be the same as someone else.. you just have to hope to beat them on the tiebreaker.
All guesses must be posted on this thread by the end of the day Saturday, midnight forum time.
Good luck in the contests. |
If your percentages are low.. just sort more. If your percentages are high.. just sort more.
Now selling Copper pennies. 1.6x plus shipping. Limited amounts available. |
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fb101
Administrator
USA
2856 Posts |
Posted - 06/25/2008 : 20:32:18
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Since I hand sort, I weigh my 82s for copper. The zincs are 80% 2.6g and 20% 2.5g and the coppers are 80% 3.1g and 20% 3.0g. I factored that into my calcs assuming the same for all cents.
There are occasional 2.9g or 3.2g coppers and an occasional 2.4g zinc. |
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natsb88
Administrator
USA
1850 Posts |
Posted - 06/25/2008 : 20:53:33
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Contest 1 - 3058 copper cents
Contest 2 - 24 wheat cents
Contest 3 - 6 Copper Canadian cents |
Nate
The Copper Cave
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longhorn
Penny Sorter Member
80 Posts |
Posted - 06/25/2008 : 20:55:27
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Thanks for sponsoring the contest HCBTT! This should be fun
I weigh all my boxes and bags in kg, and calculate approximate cu yield. The calculation is simple and I posted it in the yield thread earlier. For a contest like this the difficulty comes in estimateing the weight of the container, as well as factors such as wear, debris, and canadian pennys.
My guess is 2343 copper pennies, 47 wheats, 19 Canadian, no indian.
Good luck to all. |
Obey Gresham's Law |
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kieblera5
Penny Hoarding Member
USA
859 Posts |
Posted - 06/25/2008 : 21:35:23
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My guess is as follows:
Total coppers: 3102
Total wheats: 37
Total Canadian copper: 13
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Democracy is being allowed to vote for the candidate you dislike least.
Never argue with an idiot. They will drag you down to their level and then beat you mercilessly with experience.
Caller number seven gets the Peace Prize!
Get coding tips, tricks, and more at: http://codingmonday.blogspot.com |
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n/a
deleted
12 Posts |
Posted - 06/25/2008 : 21:59:22
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My Guesses:
Total Coppers: 2826
Total Wheats: 51
Total Canadian Copper: 17 |
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penniesmakemedizzy
Penny Pincher Member
USA
135 Posts |
Posted - 06/25/2008 : 22:41:40
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3180 Coppers
48 Wheats
25 Copper Canadians |
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WheatieFan
Penny Pincher Member
USA
106 Posts |
Posted - 06/25/2008 : 23:19:38
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2700 copper
20 wheat
20 copper canadian |
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Nickelmeister
Penny Hoarding Member
Canada
588 Posts |
Posted - 06/25/2008 : 23:27:07
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2990 copper
32 wheat
18 copper Canadian |
www.WinnipegGoldBuyer.com
Standing offer for sale of quality, second-hand solid gold jewellery:
<$100 USD worth - spot +25%, plus actual shipping
$101-500 worth - spot +20%, plus actual shipping
$501-1,000 worth - spot +15%, plus actual shipping
$1,001+ worth - spot +10%, plus actual shipping |
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redneck
1000+ Penny Miser Member
1273 Posts |
Posted - 06/25/2008 : 23:29:13
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3152 - Copper
17 - Wheat
28 - Copper Canadians |
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magnasort
Penny Pincher Member
USA
174 Posts |
Posted - 06/26/2008 : 08:32:24
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| 3333cu/75wh/111cncu |
Magnetic sorters, no moving parts except the coins |
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fb101
Administrator
USA
2856 Posts |
Posted - 06/26/2008 : 11:52:57
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Contest 1 - 2575 copper cents (including wheats)
Contest 2 - 34 wheat cents
Contest 3 - 8 Copper Canadian cents
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simplicitycounts
Penny Hoarding Member
USA
535 Posts |
Posted - 06/26/2008 : 12:03:54
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Contest 1 - 2940 copper cents
Contest 2 - 40 wheat cents
Contest 3 - 90 Copper Canadian cents |
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SmallCHange
Penny Sorter Member
USA
70 Posts |
Posted - 06/26/2008 : 13:24:52
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Contest 1 - 3000 copper cents (including wheats & Canadians)
Contest 2 - 30 wheats
Contest 3 - 10 Copper Canadians
I like round numbers. |
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TenBears
1000+ Penny Miser Member
USA
1021 Posts |
Posted - 06/26/2008 : 13:58:21
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Contest 1 -- 2888 copper
Contest 2 -- 19 wheat
Contest 3 -- 7 Copper Canadians
Zero Indians because they don't exist in the wild. |
"Rich," the Old Man said dreamily, "is not baying after what you can't have. Rich is having the time to do what you want to do. Rich is a little whiskey to drink and some food to eat and a roof over your head and a fish pole and a boat and a gun and a dollar for a box of shells. Rich is not owing any money to anybody, and not spending what you haven't got." Robert Ruark
there are too wild Indians...
there are too wild Indians...
there are too wild Indians...-----still taunted
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kavajava
Penny Collector Member
USA
490 Posts |
Posted - 06/26/2008 : 14:43:36
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Contest 1 - 3062 copper cents
Contest 2 - 33 wheat cents
Contest 3 - 4 copper Canadians |
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n/a
deleted
73 Posts |
Posted - 06/26/2008 : 19:25:45
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Contest 1 - 2047 copper cents
Contest 2 - 28 wheat cents
Contest 3 -11 copper Canadians |
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Topic |
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CONTEST - $100 bag of pennies - How many coppers?
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