How to Gain Wisdom?

01 February 2017 5,098 95 View

What is Scientific Ethics in Research and Why is it Important?

Most people learn ethical norms at home, at school, in church, or in other social settings. Although most people acquire their sense of right and wrong during childhood, moral development occurs...

01 February 2017 4,608 92 View

How can you determine if you are smart enough in your field?

31 December 2016 1,370 30 View

Is black really a colour ? Or just the absence of light ?

Is black really a colour ? Or just the absence of light ?

11 December 2016 5,705 11 View

What are the best books that you read in your field?

11 December 2016 5,155 20 View

How is nanotech different from biotech?

biotech can be thought of as a subset of nanotech - "nature's nanotechnology." Biotech uses the molecular structures, devices, and systems found in plants and animals to create new molecular...

11 December 2016 8,957 6 View

How can re-publish paper in ISI journals?

Dear RG colleagues As you know there are many fake journals , so Scientists were doing mistake to publish in fake journals ( Beall's List) may be because they did not know more about these...

11 December 2016 3,814 10 View

Why can't we imagine four dimensions?

We little humans struggle to envision a world with four spatial dimensions. Some theories (such as string theory) need as many as eleven dimensions to be hypothetically possible. If string theory...

11 December 2016 2,193 22 View

Do you think the McQ test is best one? and why?

11 December 2016 8,016 16 View

What are some notable paradoxes in Physics?

Dear RG Friends Please give some details about it and tell us why is your favorite paradox.

10 November 2016 5,910 2 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

What is the characteristic length to determine the Reynolds number for the scattered turbulent fluid flow?

Dear all, I just saw this example in FB on the difference between laminar flow and turbulent flow. The flow from a pipe hits the sink and scattered. The flow from the pipe is characterized as...

02 March 2021 1,999 5 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

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