Tags » Relativity

Falling into a black hole: tidal forces

Reference: Moore, Thomas A., A General Relativity Workbook, University Science Books (2013) – Chapter 19; Problem P19.9.

Using the Riemann tensor, we can get an idea of the force felt by someone falling into a black hole. 399 more words

Physics

Riemann tensor in the Schwarzschild metric: observer's view

Reference: Moore, Thomas A., A General Relativity Workbook, University Science Books (2013) – Chapter 19; Problem P19.8.

The component of a four-vector along a… 466 more words

Physics

Relativity

Harmonize with the tune, tap your fingers to the beat.
Move your body, shuffle your feet.
Feel it manifest from under your skin,
explode with dance or implode with meaning within. 80 more words

"Frozen Universe" Idea still accepted by uninformed philosophers

A new article in the Chronicle of Higher Education (http://chronicle.com/article/Is-Philosophy-Obsolete-/145837/) uses the old Einstein-Putnam-Penrose argument to help show that philosophy is still needed, because science by itself has such a weird idea of time (therefore philosophy must deal with the “appearance” or “manifest image” of time). 341 more words

Philosophy

No. 315


photo credit: Wikipedia and me

Relative Realisations. By CpSingleton © 2014

Isn’t tooth ache just the best?
The pulsating, itching, tickling pain,
Like a spiky balloon being… 227 more words

Poetry

SCIENCE IS COOL

Science is cool and it makes me anxious. I’m very troubled by these things. Not many people care about science and that is even more troubling. 2,343 more words

FEATURES

Song of the Day - Traditional Irish/Scottish Folk

Johnny and Phil were practically household names in my family. I was first introduced to them when I was still in diapers via Silly Wizard (1970-1988) and also through Relativity, the 1985 Scots-Irish quartet along with Tríona Ní Dhomhnaill and Mícheál Ó Domhnaill (brother and sister). 172 more words

Music