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Comment from: Andy [Visitor]

Hello Jon
I just started reading this blog it is very cool. I sent a copy of your book to my grandson Oren Nelson and am looking forward to reading it with him.
I hope all is well with you and your family

02/05/13 @ 08:58
Comment from: [Member]

Hi Andy,
I bet you miss the ice and snow sometimes! Unfortunately, we haven’t had a frost day in weeks, and we haven’t had much sun either, just the usual NW winter rain. In Japan, we would often have both frost and sun.

Nice to hear about the grandson. Would like to see you guys together, reading about snow or otherwise.


02/05/13 @ 22:35
Comment from: Jim J Jewett [Visitor]  
Jim J Jewett

Just thought I should tip you off to the reason for some extra recent traffic – a challenge issued by Professor Lewin, with this page listed as a providing a very good explanation. https://www.youtube.com/watch?v=B1QbNmCPgE0&ab_channel=LecturesbyWalterLewin.Theywillmakeyou%E2%99%A5Physics.

01/02/21 @ 14:02
Comment from: [Member]

Thanks a lot, Jim.
Prof. Lewin sure has the mad scientist look about him now.

I did not know about the term “cat ice” for the ice on these “crunchy” puddles. The 1901 book excerpt that is briefly shown in that video gives the definition, but does not mention why cat is in the term. Online, the Merriam-Webster dictionary also gives the term “shell ice", and one twitter poster (@RobGMacfarlane) writes that the ice is just thick enough to “support a cat” and hence the term.

About that Prof. Lewin video, if you look to it for an explanation, then you can better use your time elsewhere–you will find no explanation there of any freezing phenomena.

01/03/21 @ 02:13

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