Postcard of the Day

Nov. 3rd, 2017 02:38 pm
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Date: Nov. 6th, 2017 07:10 pm (UTC)
From: [identity profile] peteralway.livejournal.com
Thumb over the hose increases the speed of the water for a given flow rate (rocket engines have a similar effect in the convergent sections of their nozzles, which I taught about last week). I would assume that the fountain nozzles have an effective thumb-over-the-hose effect to get the maximum effect out of whatever pressure they have.

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fflo

Hello.

CURRENTLY FEATURING
the
Postcard of the Day

(a feature involving a postcard on a day)

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For another postcard thing, see
my old postcard poems tumblr or
its handy archive.

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I'm currently double-posting here & at livejournal. Add me and let me know who you are, and we can read each other's protected posts.

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"What was once thought cannot be unthought."

-- Möbius, The Physicists

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