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Air Gun Home Forum Index » General Air Gun Questions and Topics » Energy    View previous topic :: View next topic  Energy   Posted: Mon Sep 10, 2007 9:11 am swl Member Joined: 08 Jul 2007 Posts: 44 Location: More than 20 miles from East Coker Can anyone let me know the factor for converting grams to grains.Also has anyone got the equation to determine energy using Mass (not weight) ,Muzzle velocity etc. Thanks. swl   Posted: Mon Sep 10, 2007 9:30 am dedpool Veteran Member Joined: 20 Jul 2007 Posts: 244 Location: Hokie Nation 1 gram= 15.4323584 grains. Ha, i just happen to have my fluid mechanics book right in front of me and I believe the form of the energy equation your looking for should be this E0=E+m(v^2)/2+mgz, where E0 is the change in internal energy due to heat, m is mass, v is velocity, g is gravity, and z is elevation. You can find E0 using the first law of thermodynamics but there are like 30 different forms of the energy equation so if this one doesnt work for you we can find another(they start to get really complicated though) _________________   Posted: Mon Sep 10, 2007 10:25 am AirGunEric Site Admin Joined: 20 Jan 2007 Posts: 6931 Location: "Out There" dedpool wrote: E0=E+m(v^2)/2+mgz...they start to get really complicated though) Yeah, that one wasn't complicated enough already... _________________ ` I'd say "I care." But I'd be lying. Canadian Airgun Supplier: http://www.scopesandammo.com/storefront   Posted: Tue Sep 11, 2007 1:39 am AirGunEric Site Admin Joined: 20 Jan 2007 Posts: 6931 Location: "Out There" Probably should have put this here sooner: Weight conversions: http://www.engnetglobal.com/tips/convert.asp?catid=3 And a couple useful calculators (energy/velocity is in there): http://www.airguns.net/calculators.php Maybe I should put together a page of calculators here somewhere- not difficult, just time consuming! _________________ ` I'd say "I care." But I'd be lying. Canadian Airgun Supplier: http://www.scopesandammo.com/storefront Energy     Air Gun Home Forum Index » General Air Gun Questions and Topics You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum All times are GMT - 5 Hours   Page 1 of 1   All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First  Select a forum Main Forums----------------AirGunHome Q&AGeneral Air Gun Questions and TopicsPicture GalleryTarget Shooting: Casual, Fun and CompetitionHunting, Pest Control, Varminting People/Events/Airgun Issue Discussion----------------Introduce YourselfThe BS TopicClubs/Events/Regional/Political Airgun Issues Maintenance, Modification and Reviews----------------RiflesPistolsAntique, Collector and Novelty AirgunsBB GunsPellets/AmmoOpticsAccessoriesAirgun Smithing Buy, Sell or Trade Forums----------------For SaleWant to Buy   Note: If you are seeing "Please enter your username and password to log in." Your browser cookies have been reset or you need to register to access the topic in question. Use the 'Register' button near the top left of this page. Click Here for AirGunHome.com Main Page Powered by phpBB © 2001-2004 phpBB Group Partial Styling Supplied by Vjacheslav Trushkin Themes Database.