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

More Dulli Chandra Agrawal's questions See All

The 'Hydrobalance" is an improved version of Nicholson's Hydrometer for finding relative density. Is there another device known in the literature?

The author has designed a device known as Hydrobalance published in the American Journal Physics: The hydrobalance

10 November 2018 4,791 0 View

Is there a simple formula for estimating apparent or absolute magnitude of solo stars in terms of its radius, photosphere temperature and distance?

Please see the following publication for details. Apparent and Absolute Magnitudes of Stars: A Simple Formula

03 April 2018 6,209 1 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

08 September 2017 3,937 3 View

No title

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

04 May 2017 3,116 4 View

Tungsten incandescent lamps are designed for wattages such as 6, 60, ...1000.. What are their measured filaments temperatures during operation?

There are various methods to estimate these temperatures theoretically but in the absence of experimental data one cannot check its correctness.

04 May 2017 4,819 13 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

How to plot the probability paper of Gumbel distribution using R programing?

In R-studio, there are many commands of Gumbel package. Arguments are also different. I`m asking about the alpha parameter of the Copula which must be greater than 1. If this is the one used to...

25 February 2021 5,229 3 View

Which and How to use teaching strategies and procedures to effectively integrate the four skills while teaching English Language Online?

As an inexperienced teacher in the field of online teaching, I have the fear of unconsciously ignoring one of the skills while focusing on not ignoring the other! Therefore, I wish to make use of...

09 February 2021 5,101 4 View

How can I multiply values with standard distribution and with triangular distribution?

I am calculating emissions considering the uncertainty of the data to do Monte Carlo simulation. Some variables such as yields have normal, lognormal or even uniform distributions. These must be...

03 February 2021 6,318 5 View

How to prove possibility/impossibility to analytically solve the functional equation f(a ln x^2)/f(x)=x/2a; and how to find out the solution?

This is my very first encounter with functional equation of this kind, and methods of series solution and differential equations are of not much help. The solution to this problem, or at least the...

25 January 2021 6,053 5 View

After G actin polymerization and labelling I didn't got filaments. Why?

Purified G actin and got 42kda band and an additional band just below it. While performing G actin polymerization and labeling with rhodamine-phalloidin I didn't observe filaments under the...

20 January 2021 3,751 2 View

P-value of Dirichlet statistics in a closed-form?

Do we have a mathematical formula to compute the p-value of an observation from the Dirichlet distribution in exact sense at https://en.wikipedia.org/wiki/Exact_test?

26 December 2020 8,296 4 View

Bell's inequality from probability theory?

It is said Bell's inequality is a consequence of probability theory, which has nothing to do with quantum or not quantum. There are many papers discuss this issue, but I don't know which one is...

22 December 2020 8,254 3 View

What all factors do we have to consider to interpret cytocompatibility of a nanomaterial from Actin DAPI stained images of HOS cells cultured with it?

Phalloidin stained filaments and dapi stained nucleus

08 December 2020 8,548 3 View

What is an appropriate tip diameter size for a stimulating electrode?

I'm setting up an electrophysiology rig examining LTP in the CA1 region of the hippocampus. What is an appropriate tip diameter size for a stimulating electrode to generate fEPSP? Also, I'm...

01 December 2020 5,139 2 View

Ette Etuk

Filament lamps while functioning are "as good as new". They have exponential failure laws.

U. Dreher

"What one can infer ..."?

The mechanisms (physics) of aging and failure are well-understood.

Production is withing very tight tolerances regarding the quality of the materials as well as mechanical production tolerances.

Overall: this is a quite "mature" technology showing what can be expected after more than a century of experience and mass-production.