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.
2 pieces, 23 kg max/piece. Excess baggage fees. Each piece of check-in baggage may weigh up to 23 kg (50.5 lbs) in Economy Class and 32 kg (70.5 lbs) in Business Class. For each piece of check-in baggage that weighs more than 32 kg (70.5 lbs), you will need to pay a fee and you will have to be transported as cargo.