Let's say that we agree with Nikodem Poplawski et al. that whole universes can be born within Black Holes.

More H Chris Ransford's questions See All

In war-torn areas, females tend to seek the protection of males with the warrior gene, leading to self-sustaining wars. Any ideas how to counteract?

A warrior gene complex has been identified (James Fallon et al.), and a current theory says that females in conflict areas tend to naturally seek the protection of males who exhibit that gene...

10 November 2017 4,658 6 View

Is there a Wave Function of the Universe?

Different physicists disagree on whether there is such a thing as the wave function of the universe. - In favor of its existence is the fact that, in the Big Bang picture, all particles (and hence...

01 February 2016 6,389 85 View

Are there new recent developments in space-time theory?

Do you know of any recent experimental or theoretical advances in 'Causal Dynamic Triangulations' (Renate Loll et al.), in Quantum Einstein Gravity (Martin Reuter et al.), in Quantum Graphity...

07 August 2014 1,824 4 View

Has it suddenly become fashionable to state that 'There are no Black Holes', further to Stephen Hawking's recent paper altering their definition?

For those who take that view - can you then please walk us through what happens in the wake of a massive supernova burst ? All the scenarios I see lead back to a black hole, and I'd be really...

01 February 2014 5,210 17 View

What is the value of the ratio of two different aleph numbers ?

What is the value of, say, aleph one over aleph null ?

06 July 2013 2,001 24 View

A question about the (weak) Anthropological Principle, triggered by Jim Baggott's latest book

In his latest book 'Farewell to Reality', Jim Baggott suggests that the Anthropological Principle, even in its 'weak' rendition, is not a valid scientific area of enquiry. Do you agree? The...

04 May 2013 3,564 16 View

Consider a set A with a transfinite number of elements. Now build a set B containing all the possible subsets from A. Question:

Is the cardinality of B always stronger than that of A ?

02 March 2013 9,267 6 View

Some proponents of the metaverse say that a multiverse necessarily contains an infinity of identical copies of yourself

Along with an infinity of near-identical copies, etc. ad infinitum (Colin Bruce, Tegmark, et al.) In a nutshell, this affirmation is based on the fact that a non-zero probability (you exist, so...

02 March 2013 2,913 4 View

On peremptory cognitive bias in the sciences

I just came back from a science conference where the speaker heaped scorn on some phenomena which Quote most people believe in Unquote but which are Quote patently wrong.. For example, he...

01 February 2013 1,156 3 View

Can the Quantum Zeno Effect be observed with macro-systems?

In other words, can the Quantum Zeno Effect be observed acting on systems with many-variable wavefunctions?

01 February 2013 4,937 3 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View

How Relativistic effects is one reason for lanthanide contraction?

The Lanthanide contraction which is the decrease in ionic radii of the elements in the lanthanide series from atomic number 57, lanthanum, to 71, lutetium, is due to poor shielding of the 4f...

01 March 2021 2,272 4 View

What is the density for pva electrospining?

I'm Juan Carlos, a high school student who is working with electropinning, I made an electropinning machine with a 21g needle and a 30kv high voltage source and the distance between my needle is...

28 February 2021 298 3 View

Is there a deep reason for using the squared modulus of the wave function as the probability density of the existence of the particle?

I think we were all surprised at the first time we got to know quantum mechanics that the squared modulus of the wave function is the probability density of the existence of the particle? The role...

28 February 2021 6,282 9 View

Should we reduce the standard unit of length to 0.31951540592 meter ?

The reasoning behind this question is to align the ratios of the proton potential in energy per charge to the speed of light in distance per time. As these two dimensions appear to be related,...

27 February 2021 947 7 View

How do you mesh a thin solid in Fluent?

Hello, I have used the shell function on SpaceClaim to create thin solids for the model I am studying. These are contained within an enclosure for my study. I chose this approach as it avoids the...

24 February 2021 8,856 3 View

Are there any candidates for an Einstein's bare cosmological constant?

It is commonly accepted that General Relativity has its own 'bare' cosmological constant that contributes together with the cosmological constant resulting from vacuum energy density for an...

23 February 2021 5,448 8 View

No streamlines present in a small region inside a flow. This means exactly what?

No streamlines present means whether the flow is getting obstructed there and the velocity inside the region is zero? Or else, the fluid is trapped inside that region with a nonzero velocity?...

22 February 2021 5,249 10 View