Saransh Gupta

11 Questions 11 Answers 0 Followers

Questions related from Saransh Gupta

How are excitons real when 'hole' itself is an abstract, theoretical concept?

As the explanation goes, hole is a figment to the absence of electron as it moves to some different energy state as a result of absorption of energy of some kind. That is, I think of holes as...

11 November 2018 3,866 11 View

Can philosophy be called as a science in itself? If not, what is the difference between the two?

If philosophy provides logical and rational explanations, how is it different from the subject of science?

12 December 2013 1,762 61 View

Why do the sharp interior and exterior corners of a product act as stress raisers or stress concentration points?

A hole, sharp corner, crack etc. act as points of high stress concentration. Is it just because of the lower surface area they provide, or is there another explanation?

03 March 2013 6,707 11 View

In power cycles, what does back work exactly mean? What are the advantages?

In power cycles, some of the output work of the turbine is fed back to drive the compressor, which is often quoted as back work. If we simply provide work input to the compressor by a separate...

01 January 2013 1,447 3 View

Justify how can process of temperature rise of an ideal substance be isentropic.

By Third Law of thermodynamics; s = k ln(p) where; s = entropy k=Boltzmann constant p= Probability of finding a molecule at a particular point When temperature rises, anyhow, Internal energy and...

12 December 2012 5,950 6 View

Why does the specific heat ratio decrease with an increase in temperature?

Specific heat ratio = Specific heat at constant pressure / Specific heat at constant volume

11 November 2012 2,264 13 View

"Entropy of the universe is ever-increasing"....my question is upto what point will it continue to rise???

In nature, processes and changes occur till they attain equilibrium or some maximum value. However, this term, Entropy, seems to defy this well established fact. If every process causes entropy to...

09 September 2012 7,156 13 View

Do the brittle materials have lower tensile strength than the ductile ones?

It is well known that brittle materials absorb lesser energy to fracture than the ductile materials. Does this imply that the brittle materials have lower tensile strength than the ductile...

08 August 2012 3,102 16 View

Does processing of a material cause any change in the value of its "Modulus of Elasticity"?

As we know, the elastic modulus of a material is actually the binding force between the atoms of a material. Now, material processing may deform the material plastically that involves changes in...

08 August 2012 2,746 0 View

What is the reason that we say that the "Quasi-static" or equilibrium processes are most work efficient?

I haven't found any reasonable explanation to why we say that most work is delivered in quasi-static operations. Is it just that because they are frictionless or are there any other plausible...

08 August 2012 4,612 7 View

What is the difference between grains and crystals? They are interchangeably used in a few texts I came across.

A text I read had this line: "finer crystal structure for better performance". After a lot of thinking it seemed as if the author meant about the finer grain structure. How should this confusion...

08 August 2012 6,503 5 View