It’s so popular that you may see ham radio operators sign “73” at the bottom of an email or even social media post. The formal definition of 73 is “Best Regards” – it’s a nice way to say goodbye that is unique to amateur radio.

73 (seventy-three) is the natural number following 72 and preceding 74. In English, it is the smallest natural number with twelve letters in its spelled out name. It is the 21st prime number and the fourth star number. [1] . It is also the eighth twin prime, with 71. 73 is the 21st prime number, and emirp with 37, the 12th prime number. [2] .

For learning Morse code it is recommended that you do not try to remember dots and dashes, but remember the Morse code sounds instead. If you click on any of the highlighted letters or symbols the Morse sound will be played. If the duration of a dot is taken to be one unit then that of a …

2013年10月25日 · "73" mapped to "best regards" or "my compliments" and was intended as a general valediction for transmitted messages. It is still used for that purpose today in morse code transmissions and often makes its way into everyday correspondence among …

73 is a triangular number if we can arrange all 73 dots or objects in perfect symmetry to make an equilateral triangle. To determine if a number (n) is a triangular number, the following equation must be true:

In math, the degrees symbol is used to represent an angle measured in degrees. The symbol is typically used in an expression like this: In plain language, this represents a 45-degree angle. The degrees symbol is also used in physics as a unit of temperature for Fahrenheit and Celsius.

a) The number of dots required for 7 rectangles is 52. b) If the figure has 73 dots, there would be 10 rectangles.

2024年5月26日 · „The clifftops are a boundary between the land and the sea. A liminal space, neither here nor there, where ruiles are suspended.“ - Clever Village Lady, 73 yards. „Well, we’re the Unified Inteligence Taskforce created to investigate the extreterrestrial. And, more and more, the supernatural. Things seem to be turning that way these days.“

2022年7月19日 · If you’ve been watching my field activation videos for long you’ve no doubt noticed that, at the end of an exchange, I’ll often send “72 de K4SWL” instead of “73 de K4SWL.” “73” much like “CQ” has a very distinct sound and cadence in CW.

Level 244: Get rid of some of the blue Monsters so that you can get some yellow dots. I realise the best is to have a long line of blue dots and then end with a square while being connected to the blue Monster.