The #dalton (symbol: Da), or #unifiedAtomicMassUnit (symbol: u), is a unit of mass defined as ⁠1/12⁠ of the mass of an #unbound neutral atom of #carbon12 in its nuclear and electronic #groundState and #atRest. It is a #nonSIUnitAcceptedForUseWithSI. The word "unified" emphasizes that the definition was accepted by both #IUPAP and #IUPAC. The #atomicMassConstant, denoted mu, is an atomic-scale reference mass, defined identically, but it is not a unit of mass.

An old and rusty John Deere farming tractor sits abandoned, forgotten, and slowly being overtaken by rust and decay in an auto wrecker's yard near Rockwood, Ontario.

#BuyIntoArt #abandoned #Rockwood #Ontario #AtRest #Retired #DiscoverON #VintageTractor #RustyBeauty #JohnDeere #AbandonedPlaces #DecayPhotography #OldFarming #AutoWreckers

https://jrtphotography.com/featured/old-abandoned-farming-equipment-john-twynam.html

#SilentSunday #AtRest #Sitka #Alaska #photography

Thanks to someone in Houston Texas who ordered two copies of this #Atlanta image on a card. This was something I spotted one day when wandering in Oakland cemetery. The leaf was exactly as depicted, not placed there.

Purchase here: https://mark-tisdale.pixels.com/featured/simply-at-rest-mark-e-tisdale.html

#MastoArt #FediArt #CreativeToots #AtRest #Cemetery #Grave #MarkOnArt