TouK

thank you

Well the last days i was trying to comprehend what is going on with the spectacular phenomenon of superfluidity.
I saw some experiments with helium cooled to the temperature of 2.17K. I read about zero viscosity and all these exciting abilities it has but i couldnt find how helium acquires zero viscosity.
In addition i read that it has something to do with bosons and the Bose-Einstein Condensation and if yes what exactly is that?

I would appreciate it if anyone could explain me some basics things beacuse i am really interested in this phenomenon and quantum physics generally.

Thank you for your time and sorry for and mistakes regarding my english as i am 16 years old from greece

What a great forum ...thank you guys!

Yes of course..is there any specific range in which an object affects others?

Thank you very much!!!!
I am going to say it to my friend beacuse he wasnt sure too!

In addition, is it true that we affect each other beacuse of our gravity here on earth too?(well such force will be tiny,otherwise we would stick together).

A friend of mine said to me that every object has gravity and as a result if u place a man and a pen close to each other in the space then the pen will come closer to the man beacuse his gravitational force will effect it. Such an information seems really interesting to me and i would be grateful if someone could explain me what really happens.

-Please explain them simply(15 years old)

-Sorry for any english mistakes..didnt take the proficiency yet!

Thank you!

This topic seems so awsome to me although i understand nearly nothing! I understand that such things are difficult to comprehend but if there is someone who understands why higgs boson is so important or what do we mean when we say that it gives mass to things and more then please help me understand them too!

Thank you

In conclusion the reason is the expansion of the universe right?

I saw it on documentaries or science blogs and i consider it true.If someone has evidence on another theory then he can post it.

The age of universe is said to be around 13 billion years.However we know that stars exist 40 billion years far!

Since the fastest means we have is the light then how do we know about their existence?