Things I Learned: Google Sheets Concatenate and Text functions

A quick note today. There's a lot going on, but very little time to write about it. I have a Google sheet for recording new QSO locations. Up until today, though it munged the date and time field. That's where teh https://support.google.com/docs/answer/3094139?hl=en#null comes in. Using this function, I was able to specify the formats for date and time which were then preserved:

Update:

The day of learning to fomat text. To get 24 hour time in a Microsoft Word mail merge, use HH:mm, not hh:mm.

And Finally?

If you're printing on USPS double reply postcards and an HP printer, the print on both sides feature won't work because the paper's too short. That's OK, you can do a gyration of printing odd and then even pages and flipping the pages in between, but... Even though the printer won't print on both sides, you still need to tell it not to in the print dialog properties or it will still do wrong things, inserting blank pages.

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Cool Math Tricks: Deriving the Divergence, (Del or Nabla) into New (Cylindrical) Coordinate Systems

Now available as a Kindle ebook for 99 cents ! Get a spiffy ebook, and fund more physics The following is a pretty lengthy procedure, but converting the divergence, (nabla, del) operator between coordinate systems comes up pretty often. While there are tables for converting between common coordinate systems , there seem to be fewer explanations of the procedure for deriving the conversion, so here goes! What do we actually want? To convert the Cartesian nabla to the nabla for another coordinate system, say… cylindrical coordinates. What we’ll need: 1. The Cartesian Nabla: 2. A set of equations relating the Cartesian coordinates to cylindrical coordinates: 3. A set of equations relating the Cartesian basis vectors to the basis vectors of the new coordinate system: How to do it: Use the chain rule for differentiation to convert the derivatives with respect to the Cartesian variables to derivatives with respect to the cylindrical variables. The chain ...

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Copasetic Flow

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