At the equator, the sun is highest at the equinoxes (March and September) and lowest at the solstices. Outside the tropics, the sun is highest at the summer solstice (June or December) and lowest at the winter solstice.
Exactly at the equator the sun is directly overhead (90 degrees) at a single time point (close to 12 on depending on where you are within the time zone) every single day
The only thing that varies over the year is the path it takes to get there. At the solstices (summer/winter) the path curvature is maximal while t the equinoxes (spring/fall) it is a straight line.
I'm not sure what specific glass and metal are used in neon sign electrodes, but their definitely built to hold a higher vacuum under decades of use. Their relatively cheap and you can get them with small tubes on the end for pulling the vacuum.
I said "with" and not "at". I was tasked with doing interviews and reshaping the interview process as multiple companies within the last 18 months through fractional roles, consulting and co-founding.
Trolling is typically done on lakes with fishing lines cast from the back of a boat. A trolling motor sets the boat speed. Trawling usually takes place at sea, with larger boats and wide nets.
https://physics.weber.edu/schroeder/ua/EarthCirclesAndSunRay...
https://physics.weber.edu/schroeder/ua/SunAndSeasons.html
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