Archive for November 22, 2017

The Problem of the Spinning Tube

Posted in Cute Problems with tags , , on November 22, 2017 by telescoper

It’s been a while since I posted a problem in the folder for cute physics problems so here’s a nice little one for you to have a go at:

A vertical cylindrical tube of height 12cm and radius 6cm, sealed at the bottom and open at the top,  is two-thirds filled with a liquid and set rotating with a constant angular velocity ω about a vertical axis.  Neglecting the surface tension of the liquid, estimate the greatest angular velocity for which the liquid does not spill over the edge of the tube.

Answers through the comments box please!

 

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R.I.P. Rodney Bewes (1937-2017)

Posted in Television with tags , on November 22, 2017 by telescoper

Oh, what happened to you?
Whatever happened to me?
What became of the people we used to be?
Tomorrow’s almost over
Today went by so fast
The only thing to look forward to is the past?

Rest in Peace, Rodney Bewes, also known as Bob Ferris of Whatever Happened to the Likely Lads?, who died yesterday.