Hi Joe - I am taking the afternoon off so here are the quiz answers early: #1 - Bismuth #1A - 1.9 x 1919 years - yep, pretty much stable element based on human time lines #2 - PuO2 As for the 250 million hours, I don't have a clue on how they calculated that value other than the Voyager space crafts have been "way out there" for quite a few years. Bev wins the Diet Mt. Dew from Doug with honorable mention to Mike. Dave Joe Fjelstad <[log in to unmask]> Sent by: TechNet <[log in to unmask]> 07/10/2009 11:18 AM Please respond to TechNet E-Mail Forum <[log in to unmask]>; Please respond to [log in to unmask] To [log in to unmask] cc Subject Re: [TN] NTC - Friday Elements Quiz Hi Dave That is around 28,500 years so either there are thousands of these devices out there in space or the space program is a lot older than I thought...? ;-)? On the other hand I may be missing something in the accounting that I am not familiar with. Cheers, Joe 250 million thermoelectric operating > hours with no failures --------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------