that’s not arbitrary - the hour hand of a clock mimics the shadow of a sundial.
it makes sense, in the northern hemisphere, where 90% of people live.
that’s not arbitrary - the hour hand of a clock mimics the shadow of a sundial.
it makes sense, in the northern hemisphere, where 90% of people live.
No, that’s not why.
it’s normal for unstressed short vowels in English to all come out as a “schwa”, which the most common phoneme of the language.
https://en.m.wikipedia.org/wiki/Mid_central_vowel
Coach Z voice
that happened to me once!
adding to abnorc’s excellent answer - circuit diagrams are all drawn as if charge carriers are positive (this is called “conventional current”), but because electrons are negative, this can get very confusing when you’re dealing with components where the flow of charge is one-way only (diodes, transistors, batteries, photometers…)