How many famous rubies are in fact spindles, which look like rubies but are far less valuable. Spindles consist primarily of MGAL204, whereas Rubys are primarily AL203. If the Timmer Ruby, a 361 carat spinner, were pure MGAL204 how many moles of MGAL204 what it contain? There are exactly 5 carats per gram

What do electromagnetic waves carry? how are they produced through which media can they move? where do they transfer energy? what do they not transfer? what do mechanical waves carry? how are they produced? through which media can they move? where do they transfer energy? what do they not transfer?