How can you efficiently sort pre-1981 pennies (the ones with the higher copper content)from post 1981 pennies?
446562
Flip them. If they ring, they are pre-1981. Alternatively, drop them one by one onto a hard floor. Again, if they ring, they have the higher copper content.
124405
Not right now. Those are still in circulation. You need to wait a few more years, decades even-- and at that those bills will only be worth a higher value if they are in mint condition.
889418
1. Select the list or table you want to sort. \n2. On the Table menu, click Sort. \n3. Select the sort options you want.\n4. Click OK.
865487
3 dimes\n30 pennies\n1 quarter and 5 pennies\n2 dimes and 10 pennies\n1 dime and 20 pennies
604893
seperate them into 4s then count them as 1 dollar
302046
40 pennies, 8 nickels, 2 dimes\n45 pennies, 2 nickels, 2 dimes, 1 quarter
84403
Don't clean them, this will void them of any value. Believe it or not, old, dirty coins are worth a lot of money!\n\nAlso don't handle them a lot, the oils from your hands will get them more, for lack of a better word, "corroded". Put them in acid free protectors.
174541
use ascii value to perform the sort\nthe logic is 'a' has lowest ascii value than others
511710
It depends on the coin condition.  There are many books on grading coins which you could find at your local library, and many online price guides for collectible coins:
730990
You would have to take it to a coin dealer to find out. They can grade its condition and look it up. Chances are, it isn't worth more than 25 cents, but it is worth at least a penny!
627741
Clean your harddrive, format it and then use a 3rd party program to repeatively write over your harddrive. Then donate it to a local charity, school, reycling center. \n\nBelieve it or not, some places would welcome a really old computer that can check e-mail and write word processing. Plus you could write it off your taxes, granted not a whole lot, but better then nothing. \n\nThe cell phones are a different story though, same with the printers. Contact the brand and see if there is a place you can recycle them for free. Also, many big cities run eletronic recycling programs. It prevents heavy metals from contaminating water supplies, plus the cities often earn some money from gold extraction.
623319
Copper is a tricky one, as there appears to be true demand from China and not that many new ways of digging up significantly more ore.  It might be that people who rely on copper decide to find ways to get around using copper.  Maybe aluminum cable instead?\n\nIn the case of zinc, there is a special price level maybe 10% or so above where it is now, where it is worth melting US pennies (which are 97.5% zinc).  At this price the zinc and copper in pennies becomes worth more than one cent per penny, plus the energy needed to melt it down.  There will then be a huge amount of illegal melting of pennies and demand will be satisfied for awhile.\n\nIn summary I think copper might be higher, but there is a lot of uncertainty due to the various things that could happen, such as a decrease in copper demand.  And zinc price could be limited by penny melting.  I wouldn't invest much in this area personally.
405401
Well, I put "historical prices" into a search engine and got plenty.  There's one at the link below?\n\nAre you interested in particular countries or time periods?  Or particular commodities?
1075216
Due to a rise in copper prices in 1973 the mint resolved to do away with copper cents. 1.5 million aluminum cents dated 1974 were produced by the Philadelphia Mint. Opposition by the vending machine industry caused Congress to change its mind. All the aluminum cents were ordered to be recalled, counted and melted. None were released to the public. Only 12 examples remain unaccounted for, not counting one example in the Smithsonian. Several Congressmen and other government officials who were recipients of this experimental issue either claimed the pieces were lost or refused to return them.\n\nAs far as the worth, click then read the link below.
196079
Place a penny on a busy sidewalk (in a shopping mall) and notice how many people pass by it.  Then place a nickel and see if that number changes, and then a dime and then a quarter.  You should be able to chart a direct relation to the number of stop and pick a coin the more its value increases.  Thus you are observinb people's behavior when it comes to the time and effort to bend over and pick up a coin in relation to the relative worth of that coin.
669633
do you mean you want to sort them? well, you just need to search for sort algorithm. There are some that needs mentioning, like QuickSort and Bubble sort, the first being are the fastest but most complicated and the latter simplest but inefficient. \n\nQuickSort is sorting by choosing some middle value (randomly, or for more efficiency, chosing the approximate median), and checking other value, if it is larger than the current value, it's put after the middle value, if it's smaller, it's put in before the middle value, if it's equal, it's up to programmer want to put it at low or high value (basically, seperating data smaller than middle value and larger value.). Then the data collection in the smaller value and the bigger value is sorted individually. Gradually, this will sort the datas. However, it is widely known that, when working with smaller amount of data, quicksort has a huge overhead, and usually when the data is small enough, the program switch to other sorting method.\n\nVisual on QuickSort\n1 5 6 8 4 7 5 9 6 5 1 2 4 7 8 9 'initial data\n1 5 6 8 4 7.5.9 6 5 1 2 4 7 8 9 'choose midvalue 5\n1 4 1 2 4.5.5 6 8 7 9 6 5 7 8 9 'seperate low and high value\nlow1= 1 4 1 2 4, high1=5 5 9 8 7 6 8 7 9 6 5 'sort low first\nlow1 = 1 4 1.2.4 'mid value = 2\nlow1 = 1 1 2 4 4 'low1 sorted\n1 1 2 4 4, high1=5 5 9 8 7 6 8 7 9 6 5 'sort high\nhigh1=5 5 9 8.7.6 8 7 9 6 5 'middle value = 7\nlow2=6 5 6 5 high2 =7 9 8 7 9 8 'sort low\nlow2=6 5 6 5 ' middle value 5\nlow2=5 5 6 6 ' sorted\n5 5 6 6, high2 =7 9 8 7 9 8 'sort high\nhigh2 =7 9 8 7 9 8 'middle value 8\nhigh2 =7 7 8 8 9 9 'sorted\n\nlow1 = 1 1 2 4 4\nlow2=5 5 6 6\nhigh2 =7 7 8 8 9 9 \n\nassemble these together:\n1 1 2 4 4 5 5 6 6 7 7 8 8 9 9 \n\nPhew, QuickSort really is NOT for human. It's hard for human to sort using quicksort, but relatively easy for computer, using self-calling functions\n\n~~~~~~~~~\n\nBubble sort is sorting algorithm by comparing a value, to it's next value. If the next value is smaller than the current value, it is swapped, if the next value is larger it do nothing. Then move to the next pair, until the last pair. Then repeat the process from the first data until all data is sorted.\n\nVisual on Bubble Sort:\n15 43 64 61 57 67 89 74 65 'initial data\n15 43 64 61 57 67 89 74 65 'check 15 and 43, do nothing\n15 32 43 71 57 67 89 74 65 'check 43 and 32, swap\n15 32 43 71 57 67 89 74 65 'check 43 and 71, do nothing\n15 32 43 57 71 67 89 74 65 'check 71 and 57, swap\n15 32 43 57 67 71 89 74 65 'check 71 and 67, swap\n15 32 43 57 67 71 89 74 65 'check 71 and 89, do nothing\n15 32 43 57 67 71 74 89 65 'check 89 and 74, swap\n15 32 43 57 67 71 74 65 89 'check 89 and 65, swap\n15 32 43 57 67 71 74 65 89 'repeat process\n15 32 43 57 67 71 74 65 89 'check 15 to 74 is already sorted\n15 32 43 57 67 71 65 74 89 'check 74 and 65, swap\n15 32 43 57 67 71 65 74 89 'check 74 to 89 is already sorted\n15 32 43 57 67 71 65 74 89 'check 15 to 71 is already sorted\n15 32 43 57 67 65 71 74 89 'check 71 and 65, swap\n15 32 43 57 67 65 71 74 89 'check 71 to 89 is already sorted\n15 32 43 57 67 65 71 74 89 'check 15 to 67 is already sorted\n15 32 43 57 67 65 71 74 89 'check 67 and 65, swap\n15 32 43 57 67 65 71 74 89 'check all data sorted\n\nNote: in this one, I rather lucky, the random data I used is rather already almost sorted. Bubble sort is slowest when a data is already sorted, but reversed to what it should have been sorted, while fastest when the values are almost sorted.\n\nTrivia: the name bubble sort come since in bubble sort, the higher data is like a bubble, it goes up and up, while the lower value goes down and down
971841
call your local waste authority to see where you can take idems like that.  There are usually several businesses around that will take older hardware and make it new for other people in need to use.  It was very nice to think about something like that. :D