For the quintessence of classical philosophy, see Aether (classical element). Boron is a chemical element with symbol B and atomic number 5. Produced entirely by cosmic ray spallation and supernovae and not by stellar nucleosynthesis, it is a low-abundance element in the Solar system and in the Earth's crust.
The weight of a polo shirt depends on the size and fabric. The  average weight for a men's short-sleeved polo shirt in size large  is about 8 ounces.1 person found this useful.ow much does a medium sized t-shirt weigh?   On average: Small: 6 oz. Medium: 6.5 oz Large: 7 oz X-Large 7.50 2X-Large 8.75 3X-Large 9.50 But it can vary depending on material.
Standard collars can be of any material, usually metal, and they can weigh up to 2.5 kilograms (5.5 lb) each for both men and women. Typical Olympic bar with a pair of collars, the plates not counted, can weigh as much as 25 kilograms (55 lb) for men and 20 kilograms (44 lb) for women depending on the collars.