The mass-abundance of the nine most abundant elements in the Earth's crust (see main article above) is approximately: oxygen 46%, silicon 28%, aluminum 8.2%, iron 5.6%, calcium 4.2%, sodium 2.5%, magnesium 2.4%, potassium, 2.0%, and titanium 0.61%.he mass-abundance of the nine most abundant elements in the Earth's crust (see main article above) is approximately: oxygen 46%, silicon 28%, aluminum 8.2%, iron 5.6%, calcium 4.2%, sodium 2.5%, magnesium 2.4%, potassium, 2.0%, and titanium 0.61%.
Choosing Disc Weight. Disc golf discs come in a variety of different weights. Most discs weigh between 165 and 175 grams. Some discs also come in special plastic blends designed to weigh less. The Professional Disc Golf Association regulates how heavy a disc can be based on the discs diameter.
16.4 What licensing obligations exist when replicating and distributing content on prerecorded BD discs? 16.1 Who owns the name Blu-ray Disc and its logo? For the most part, the Blu-ray Disc name and its logo are trademarks of the Blu-ray Disc Association (BDA). Originally, Sony Corporation (Sony Kabushiki Kaisha) and other founding BD companies registered Blu-ray Disc in various countries but have since transferred ownership to the BDA.