the probability that an earth would be just like ours is very very low, but if their is an infinite amount of universes to test that probability , then yes their would be.

 

what is the best save possible on tpt?

It is https://powdertoy.co.uk/Browse/View.html?ID=244432 by firefreak11 in march 2011

 

 

why has nobody else made thunder guns like these?

because nobody else wants to or has thought of it

 

When it’s all said and done, will you have said more than you’ve done?

it depends on how much you have said and done

 

is the universe finite?

In terms of space, no, not according to the big bang theory. In terms of time, yes, IF there is an absence of dark energy. If there is enough dark energy, the universe will go back on it self under the fundamental forces of gravity. What happens before & after still remains a mystery.

What is the Schwarzschild radius of a single proton?

a proton eh?  .....not entirely sure, but it would have to be EXTREMELY small. like really...Really small. like a fentometer maybe. but im not sure

 

EDIt: my question: Swarzchild radius of ...... a charm quark?

The radius of a proton is about 8x10^-15m.

The radius of a charm quark is about 10^-19m.

 

What gives a substance its property to reflect certain wavelengths of light, thus giving it its colour?

It's due to the frequency of the electrons in the material interacting with the photons causing some wavelengths to be absorbed by electrons oscillating at their frequency.

How big must a mass be to have 855 J of energy (about the energy of a bullet) and travel at the speed of light?

EDIT:
Forgot to update, sorry mniip, I'll leave that question to someone who knows

@mniip (View Post)

 i think there is one, i have tried it before but it did not run very well. so therefore, no.

@therocketeer (View Post)

the faster you go, the slower you go.

 

why is there life on earth?