Showing posts with label negative mass. Show all posts
Showing posts with label negative mass. Show all posts

Wednesday, April 19, 2017

Diary: negative mass + Tintinhull + Montacute

I was reading the 'Stardrive' book this morning (the part about how the Casimir effect is related to a regime of negative energy between the conducting plates) when the latest news broke about negative mass.
"Washington State University physicists have created a fluid with negative mass, which is exactly what it sounds like. Push it, and unlike every physical object in the world we know, it doesn't accelerate in the direction it was pushed. It accelerates backwards."
The discussion at Physics StackExchange clarified that this does not mean stuff falls upwards. No cavorite then.
"You also asked whether an object with negative mass falls up or down. The equivalence principle tells us that gravity is indistinguishable from uniform acceleration. That means that positive and negative masses have to behave the exact same way under gravity, so negative mass falls down."
If you want a complete explanation ... .

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This afternoon we took a trip.

Clare and your author at Montacute House

Montacute House: an Elizabethan wonder

Tintinhull Garden

We've been discussing (as a family) who'd we vote for in the first round of the French Presidential election this Sunday. I think we're converging on Jean-Luc Mélenchon: his policies seem to have something for each of us 😎 ... .