Recent content by geneen

I think the idea of infinite energy is not logical... AND we don't have infinity mass even a black hole has finite mass >>>> ( the equivalence of mass and energy)

isn't here suitable for this kind of questions ? or I must put it in another branch? thanks

Hi the question is exactly like that ( A permanent magnet alloy of samarium and cobalt has a magnetization M= 7.5*10^5 J/T.m^3 . Consider two magnetized spheres of this alloy each 1 cm in radius and magnetically stuck together with unlike poles touching. What force must be applied to...

Hi ... how can I calculate the force between two permanent magnetized spheres(each r in radius) and has a magnetization (M) when they are magnetically stuck together with unlike poles touching?? I tried to think about it and found the following: 1) I can treat it like Earth magnetic field...

[SIZE="3"][FONT="Arial"]russ >>> no problem :wink: MeJennifer >>> thanks :smile: RandallB >>> big thanks for you :smile: you find the wrong point in my imagination :cool: I think the answer is we ignore the influence of the air because we are assumed that the air moving with the...

[FONT="Arial"][SIZE="3"]Hi again :0 first of all (russ, jennifer, jessem)thanks for the effort .. yes , i know that (by the way I think you reversed the hypothesis.. perpendicular ray take less time than horizontal ray) and what I mean here was the properties of the rays when they are...

HI I have difficulty with imagine why i must see the shift in the interference fringes when we rotate the apparatus 90 degrees ! what exactly happen to make me assuming see this shifting?( in michelson-morley experiment) because when i finish from rotating, the same rays will be...