# Swapnil's Message board- III

Hi!

Due to excess comments in the last messageboard, I thought of posting the third version of it. Feel free to ask me questions or talk to me about any random topic. I would be happy if you discuss mathematics problems with me.

Regards,

Swapnil Das.

Note by Swapnil Das
5 years, 6 months ago

This discussion board is a place to discuss our Daily Challenges and the math and science related to those challenges. Explanations are more than just a solution — they should explain the steps and thinking strategies that you used to obtain the solution. Comments should further the discussion of math and science.

When posting on Brilliant:

• Use the emojis to react to an explanation, whether you're congratulating a job well done , or just really confused .
• Ask specific questions about the challenge or the steps in somebody's explanation. Well-posed questions can add a lot to the discussion, but posting "I don't understand!" doesn't help anyone.
• Try to contribute something new to the discussion, whether it is an extension, generalization or other idea related to the challenge.

MarkdownAppears as
*italics* or _italics_ italics
**bold** or __bold__ bold
- bulleted- list
• bulleted
• list
1. numbered2. list
1. numbered
2. list
Note: you must add a full line of space before and after lists for them to show up correctly
paragraph 1paragraph 2

paragraph 1

paragraph 2

[example link](https://brilliant.org)example link
> This is a quote
This is a quote
    # I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
# I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
MathAppears as
Remember to wrap math in $$ ... $$ or $ ... $ to ensure proper formatting.
2 \times 3 $2 \times 3$
2^{34} $2^{34}$
a_{i-1} $a_{i-1}$
\frac{2}{3} $\frac{2}{3}$
\sqrt{2} $\sqrt{2}$
\sum_{i=1}^3 $\sum_{i=1}^3$
\sin \theta $\sin \theta$
\boxed{123} $\boxed{123}$

Sort by:

Do you like Pigeons?

- 5 years, 6 months ago

Lol no.

- 5 years, 6 months ago

Why? They are so simple and soft...

- 5 years, 6 months ago

- 5 years, 6 months ago

If you get time, please share the InPhO paper. Thanks.

- 4 years, 5 months ago

Could the master provide a solution?

- 4 years, 5 months ago

- 4 years, 5 months ago

i'm no master :p the q is a little hint: tricky think in the terms of relative motion

- 4 years, 5 months ago

I'm currently studying Algebra and Number theory. Can anyone suggest books for them?

- 5 years, 6 months ago

So, allow me to launch a topic for discussion, a number theory problem. This was the problem I had doubt in, but was unfortunately unable to get a nice solution. Can anyone provide one?

- 5 years, 6 months ago

@Matt DeCross Would you do like to post some problems on thermodynamics? It shall be greatly appreciated, Thanks!

- 5 years, 5 months ago

What if I add the condition : If $xyz=1$ to the problem? Will the answer be correct then?

- 5 years, 4 months ago

@Otto Bretscher Happy Birthday!

- 5 years, 3 months ago

- 5 years, 3 months ago

Did you know that he had is B'day?

- 5 years, 3 months ago





- 5 years, 3 months ago

Thanks, but it's not my birthday, actually ;)

- 5 years, 3 months ago

LOL, I suddenly I saw a change in your profile to 60. When is your B'day? I want to wish you.

- 5 years, 3 months ago

That change happened a few month ago, on January 27 ;) I usually spend my b-days with the Compañeros in Cuba, but this year, for the special occasion, we went to Alhambra, Granada, Al-Andalus, the most magnificent complex of buildings I have ever seen.

- 5 years, 3 months ago

Aww, I missed it :(

- 5 years, 3 months ago

- 5 years, 3 months ago

I am born on the 5th of December, it was very kind of you to ask me, Sir :)

- 5 years, 3 months ago

I would really appreciate if you reply to this very question of mine. - Do photons possess mass?

It might be that they don't have rest mass, but have relativistic mass. Or do they don't have both?

- 5 years ago

There was a time when physicists weren't sure if neutrinos had mass. Now not only we know they do, we know that neutrinos have "oscillating" mass, i.e., can vary over time, not related to relativistic effects. Unlike neutrinos, however, photons are still considered to be true massless particles. There are very few "true massless particles", the other two being the gluon and the graviton. All three are gauge bosons, respectively of the electromagnetic, strong force, and gravitational forces. Because they have no rest mass, they always travel at the speed of light in free space. All other particles that have a rest mass can be found to be traveling at considerably less than speed of light in free space.

Physics experiments have been done where light travels very slowly, but not in free space.

- 5 years ago

Thanks a lot!

- 5 years ago

@Pranshu Gaba Which branch did you take at the IISc?

- 4 years, 11 months ago

There is just one branch in IISc for the first three semesters (1.5 years) in the undergraduate program. We have six courses for the each of the first three semesters: Physics, Chemistry, Biology, Mathematics, Engineering and Humanities. After three semesters, we will choose one of these subjects as a major and one subject as a minor.

- 4 years, 11 months ago

What are you plans? What will you take?

- 4 years, 11 months ago

Right now, I think I will take either Maths or Physics as major and biology as minor. However, I still have a lot of time to decide, and my preference changes very frequently. I have no idea what i'll end up taking.

- 4 years, 11 months ago

- 4 years, 5 months ago

Kindly delete the following accounts, as they do not serve any particular purpose:

- 4 years, 5 months ago

If you own those accounts, you can deactivate them yourself.

For privacy reasons, we do not edit account details without further collaboration about ownership.

Staff - 4 years, 5 months ago

I owned them back in 2013-14. The emails got hacked and passwords lost, forcing me to create a new account.

- 4 years, 5 months ago

In that case, just ignore them then.

Staff - 4 years, 5 months ago

I had a personal question, feel free to ignore if you don't like.

What's your aim in life? What do you want to become?

- 4 years, 4 months ago

Well.Pretty much I want to do research in mathematical physics/or Theoretical physics....Although I haven't explored much fields.But I would do research over corporate sector ...I like physics a lot and the use of mathematics just adds more to my interest.....But still I feel its quite hard to predict now.

- 4 years, 4 months ago

Our interests match so much! I was recently exploring mathematical physics and found that it's much more of mathematics than physics. Theoretical physics is much better, but I don't qualify as of the IQ required.

- 4 years, 4 months ago

What do you exactly mean by the IQ required????Some areas of physics do require heavy maths like string theory or relevant super symmetric ones(super string theory is what we say),Quantum mechanics(equations relating the strong coupling of quantum systems are mathematically quite challenging).But earlier both physicists and mathematicians tended to be the same.But it was the unprecedented developments that took place in math(although they were also in physics)that these two seemed to diverge..prediction of laws of nature(is want theoriticial physicists do) and explaining those through equations and their modelling(this is dealt in mathematical physics).Do search for "Edward Witten".The only physicist to win a fields medal.

- 4 years, 4 months ago

• By 'IQ required', I think that I'm not intelligent enough to deal with such prestigious and challenging areas of physics.

• I know Ed Witten from Class 6th :P

- 4 years, 4 months ago

Bhaina could you please provide some advice for NSEP and NSEA to this poor guy? :P

- 4 years, 4 months ago

- 4 years, 4 months ago

Hari Bola, Jai Jagannath Thank you lol :P

- 4 years, 4 months ago

Knowing that you're certain of qualifying KVPY, do you give more importance to JEE or IPhO >

- 4 years, 4 months ago

IPHo was the main priority in class 11(I read so much maths and physics that my Chem marks were surprisingly less).So This time I will have balanced approach towards both.

- 4 years, 4 months ago

Bhaina, I need your help again :P

You just passed 11th, didn't you? If you could remember, what were the chapters of Mathematics phase test 1?

- 4 years, 4 months ago

Basic mathematics(functions,limits,derivatives,integration),Trigonometry...That was enough to trouble us in the reshuffling test.

- 4 years, 4 months ago

Why do they keep Calculus in Phase test 1?

- 4 years, 4 months ago

Oh phase test had basic maths,trigonometry,straight lines and circles.The calculus part is just an intro..Nothing much.Its generally taken up in class 12

- 4 years, 4 months ago

Basic math includes set, function, relation and logs?

- 4 years, 4 months ago

Today, I'm in a great trouble, brother. Perhaps you only could help me out, please help me.

• First of all, are you student of KK Sir ( Chemistry)?
• The very chemistry teacher whose tuition I attend teaches very untimely topics, though nicely. I mean, he's teaching us ion electron method without Mole concept or atomic structure. How could I study both the topics together? (Atomic and Redox) They're confusing me like hell.
• Do you attend any other chemistry tuition? How do you deal with the situation?

- 4 years, 1 month ago

Yes I am..I used to ignore Chem in class 11 in pursuit of solving more of P+M. Initial phases were easy as I am pretty strong with physical chemistry. I knew most of the topics beforehand. But I joined kk sirs class. For he was teaching inorganic(believe me you will feel more of fun rather than rote learning if you go his way) . But I advise join his class coz he is probably the only one teacher who knows linking topics.. The best way.... Chem is scoring sub and don't neglect it.

- 4 years, 1 month ago

Hmm. Everything was alright upto now, I was discouraged for this ion electron method only. I can't solve RC Mukherjee!

- 4 years, 1 month ago

@Spandan Senapati Could you tell me. how are the chemistry teachers at FIITJEE (CMP)?

- 4 years, 1 month ago

For us CDM is the code of Chem teacher. He is a great teacher.... And very receptive..... I like his teaching....

- 4 years, 1 month ago

Then why KK sir?

- 4 years, 1 month ago

Coz CDM sirs strong point is organic... Physical and inorganic.... OK (you know what it means)

- 4 years, 1 month ago

Ohk! Was he your 11th teacher too? If no, how was your 11th teacher:?

- 4 years, 1 month ago

Ya in cmp teachers don't change. In 12th even our teachers are the same.

- 4 years, 1 month ago

Could you recommend me some books on thermodynamics please?

- 4 years, 1 month ago

....Read HCV that's enough...Or refer Atkins physical chem that might be helpful

- 4 years, 1 month ago