Recent content by dreamfly

Thank you!

no,not a certain data .we're studying "the modern method of material analysis",so i desire anything about it !

if anyone own that ,please have it shared OK?Thanks!:smile:

ok thanks! it's just our teacher told us to prove this equation by Gauss' theorem.and now I've known the process.thanks!

how －∫(v)laplace functor *J*dτ change into -∮(s) J(n) dS using Gauss formula?

:smile: yes I'm in university now.but we haven't study it normally & deeply.i only know some basic knowledge about quantum physics,like uncertainty principle,Schrodinger equotion...according in being knowledge, i got some basic puzzles. and want to get the answers here.so i beg your instruction...

:rolleyes: But i still have some puzzles:what's"the order in which they are made"?and what's "Poisson brackett"?and does it mean that the quantum nature is a nature of the world?but how unimaginable it is!will the God dicing,really?

& if you want to measure its tempreture,the thermometer would fly with it,therefore there'll be no kinetic energy to the thermometer,so the figure will retain the same,isn't it?

i remember that I've read stephen hawking's <<a brief history of time>>.in the book it mentioned that Gravity works through photon.but i don't know too much about that.

Well,it's seems that we can detect many facts from equotions,so i preciate how marvellous the universe is.But why & how position and velocity become uncertain when objects become smaller and smaller?Is it decided by objects' time-space property?

i'm a green hand in this field,maybe the question i asked is droll,but i want to know some wonder thing about quantum physics. i know that one dimensional potential trap can be reckoned from Schrodinger equotion, but what about the actually fact? How dose one dimensional potential trap form...

Thank you!

is the rest system to viewer?

This is because you're in the different view.relativistic mass is relativistic mass,and energy is energy.they are connectted by M-E eqoution.They are equal.