freethemullet's comments

freethemullet | 6 years ago | on: Strava cuts off Relive

The network effect strikes again ...

freethemullet | 6 years ago | on: Too Many Companies Drain Value from the Economy

Free markets are free to have monopolies.

freethemullet | 7 years ago | on: Scientists Watch as Heat Moves at the Speed of Sound

Depending on the concentration of defects and the length scale of the system, theory suggests that it may be possible to observe second sound at much higher temperatures beyond 120 K.

freethemullet | 7 years ago | on: Scientists Watch as Heat Moves at the Speed of Sound

Long wavelength phonons are the familiar sound waves. Smaller wavelength phonons have different group velocities due to dispersion.

The speed of second sound is not the same speed of first sound. The speed of second sound is essentially determined by a weighted contribution of the different of speeds of the different phonon modes that collectively participate to produce a temperature wave.

freethemullet | 7 years ago | on: Scientists Watch as Heat Moves at the Speed of Sound

Laser interference is not required. The original second sound measurements in superfluid Helium used a geometry similar to the one you describe, where a heat source (as a pulse or periodic in time) is positioned at one end and the temperature is recorded at some point(s) along the sample.

freethemullet | 7 years ago | on: Scientists Watch as Heat Moves at the Speed of Sound

Here is the arxiv version of the Science paper mentioned in the article: https://arxiv.org/abs/1901.09160.

freethemullet | 7 years ago | on: Scientists Watch as Heat Moves at the Speed of Sound

The experiment describes an unusual process observed in a system driven out of equilibrium (i.e., non-equilibrium), where, strictly speaking, the 2nd law does not apply.

freethemullet | 7 years ago | on: Second sound in graphite above 100 K

The arxiv version: https://arxiv.org/abs/1901.09160

freethemullet | 7 years ago | on: Mark Zuckerberg Promised a Clear History Tool Almost a Year Ago

We could choose to cease to have preferences, limiting what there is to target.

freethemullet | 7 years ago | on: America’s Professional Elite: Wealthy, Successful and Miserable

Maybe "Notes from a Dead House" by Dostoevsky?

freethemullet | 7 years ago | on: In the foundations of physics we haven't seen progress for the past four decades

Do you think the golden age of the internet is drawing to a close?

freethemullet | 7 years ago | on: Technology’s dark forest

I suppose dark forest is a reference to a "forest dark" from Dante's Inferno?

freethemullet | 7 years ago | on: The Rhine waterway risks becoming impassable because of climate change

If we knew how probabilities worked, we wouldn't be surprised.