Could absolutely black body absorb its own thermal radiation?

Thank you your clarifications.

09 October 2019 4,002 2 View

What are research on a robot- mathematician/physicist?

Dear Sirs, Could you advise on modern computer programs that models brain, namely solving physics and math problems? Maybe there is a research on a robot who does not only think but conduct...

09 October 2019 1,235 1 View

Does plane (spherical) EM wave expression mean infinite EM interaction speed?

Dear Sirs, Everybody knows plane and spherical wave solutions of Maxwell equations, e.g for decaying plane wave E=E0*exp(-kx)*cos(w(t-x/v)). But seems to me they give the unreal situation that...

09 October 2019 230 14 View

Is it possible to make prism deviation angle minimum (as a function of incidence angle) more abrupt?

Dear Sirs, The setup for the dispersion measurement is as follows. Hg lamp, collimator, goniometer with triangular prism. We measure the light dispersion using the prism. To do so we determine...

09 October 2019 9,326 8 View

Why do we have only two real images of source after the converging lens but not infinite number of real images in the experiment?

Thank you for the references and explanations

09 October 2019 6,237 6 View

Why does atom ionisation happen not in a narrow frequency range but when the energy quant is more than the red boundary?

Dear Sirs, I would be grateful for references and explanations.

09 October 2019 4,219 2 View

How do I access to clipboard permission for Java applet in IE 11?

Dear Sirs, Java applets are not supported by most browsers excepting internet explorer. I run my java applet from IE 11 but still have one problem. I can not cut and paste the data from the...

02 March 2019 1,374 4 View

Are you sure in your memory? If yes it is then what is your precise private criterion of your confidence?

What are private criteria of memory accuracy? I do not know answer but I think that maybe the answer is absent in principal!!! I request you to reply on the question. Let you remember some fact...

03 April 2018 2,451 0 View

Did anybody investigate neurons which are responsible for our mathematical abilities?

Prof. Hawking worries about we are intermediate species and soon new creatures will appear, e.g. ai-robots. Maybe the situation is more fantastic. it will be men with new abilities, maybe even...

10 November 2017 640 7 View

Can a man be considered as a set of huge number of remembered automatic actions learned from society?

07 August 2017 530 12 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

How climate change will influences human and animal behavioral change?

The role of climate change influencing the human behavior as well as economics interest

01 June 2021 0 0 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 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

Could you recommend any books about Number Theory?

Beginner level books. High level books. Analytical Number Theory. Algebraic Number Theory. Combinatorical Number Theory. Books about partitions. Books about primes.

03 March 2021 7,174 5 View

What are some of the research gaps in machine learning and artificial intelligence in africa?

i would to know some of the research gaps in the artificial intelligence field in most african countries.

03 March 2021 6,145 3 View