Heat

What is “heat” exactly? What are we referring to? The Wikipedia page on heat is unsure. On the left the scientists use the verb “to heat” depicting the transfer of thermal energy from one thing to another, but on the right the flashy photo describes “heat from the sun” as though “heat” were a thing to be passed.

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Music Theoried

At some point, some dude came along and determined that a certain frequency of sound would be known as an “A”. This was a completely arbitrary decision of course, there are an infinite amount of tones possible- also for whatever reason it was decided that there were 12 other such “notes” out there. The frequency chosen to be “A”