Dulli Chandra Agrawal

17 Questions 9 Answers 0 Followers

Questions related from Dulli Chandra Agrawal

During normal inhalation, pressure in alveoli is 3 mmHg below atmospheric pressure, enabling air to flow into them. How is this pressure achieved?

For a better teaching in the class.

20 February 2024 314 1 View

Does the internal energy of the earth's atmosphere change between day and night? Perhaps it does not—it is warmer during the day and colder otherwise?

This question is perhaps very similar to the one asked by German astrophysicist R. Emden, “Why do we have winter heating?” What is the rationale for our comfort?" Whether its answer can be...

28 December 2023 9,007 1 View

Why it is that well water is warmer in winter and cooler in summer?

The above question was posed by great Lucretius (98 - 55 B. C.) and had offered a curious explanation: "This happens because in summer the earth is relaxed by the warmth and any particles it may...

25 October 2022 6,398 2 View

What would be the volume of vapor per gram of water evaporated over the surface of the oceans having temperature 288 Kelvin?

Unable to locate the citation.

23 April 2022 9,220 2 View

What is the role played by latent heat released in the atmosphere at an altitude of 2 to 3 kilometers where water vapor condenses followed by rain?

For teaching purpose.

17 April 2022 8,598 3 View

How long a person can survive if he stops food intake, just consumes water and requisite blood injected regularly? What are medical benefits, if any?

Whether one can live on blood and water only.

22 October 2018 7,403 0 View

Fall of the temperature which reverses also at certain altitude in lowest atmosphere of planets of our solar system has been noticed. Is it explained?

Please read 1 Density, pressure and temperature in the earth's atmosphere 2. The book-ASTRONOMY (page 395) available at...

30 October 2017 8,608 3 View

Photosynthetic solar constant may be adopted in teaching rate of plant growth, estimating crop yield, solar power going into photosynthesis and so on?

This is a suggestion based on my paper Photosynthetic Solar Constant https://www.researchgate.net/publication/41822989_Photosynthetic_Solar_constant

02 September 2017 4,914 3 View

Half, average & most probable lives of tungsten filament lamps are exactly same. What one can infer from the view of physics, statistics, technology..

Please read 1. Half, average and most probable lives of filament lamps https://www.researchgate.net/publication/301328799_Half_Average_and_most_probable_lives_of_filament_lamps

01 July 2017 9,456 2 View

I have proposed in a paper that moment of inertia of a fundamental particle is β(ℏ^2⁄(mc^2 )); β≡Dirac operator. Can someone suggest its application?

This observation is based on analogy. Please see the following two publications. 1. Inertia of fundamental particles on the basis of...

23 May 2017 942 3 View

Bump type speed breakers are very common on the roads whereas inverse bumps are rare? Quantitative & qualitative discussions will benefit students.

This will help a large community of teachers.

01 January 1970 2,917 3 View

What is the symbol 'N'? The question P197(page 38), its solution on page 61 in Quantum (https://static.nsta.org/pdfs/QuantumV7N4.pdf) has this symbol.

I wanted its value.

01 January 1970 2,312 0 View

The Carnot theorem is used to derive the Clapeyron-Clausius equation; what are other beautiful applications of the Carnot theorem?

The Carnot theorem has been used to derive the Clapeyron-Clausius equation. This topic has been discussed pedagogically on page 27 in the article "The friction and pressure of skating" published...

01 January 1970 794 0 View

During flood the flow of the river Ganga at its Assi (Varanasi) bank is seen to take either of all four possible directions; how to understand it?

Since I take bath in the river Ganga at its Assi bank and have noticed that sometimes it is flowing towards me, shortly after it is flowing away, another instant it starts taking the path towards...

01 January 1970 9,181 3 View

Carnot cycle for air and sound motion in air, both are having adiabatic rarefaction and adiabatic compression; whether Carnot had ever thought of it?

Similarly, Carnot cycle for air and sound motion in air, both are having isothermal rarefaction and isothermal compression; of course, in this case velocity of sound will have a somewhat lower value.

01 January 1970 9,639 0 View

Is there any acknowledged modest method which is in practice to empty the urinary retention in case of senior males’ bladder?

This knowledge will be very beneficial for senior males.

01 January 1970 6,918 6 View

How does the temperature of our bottom increase with regard to time while occupying a chair with a bad conductor seat, and how is it harmful?

This is the problem most of us are facing.

01 January 1970 6,534 0 View