Theo mẫu nguyên tử Bo trong nguyên tử Hidro chuyển động của electron quanh hạt nhânlaf chuyển động tròn đều . Biết bán kính Bo ro = 5,3.10^-11 . Tốc độ của electron trên quỹ đạo dừng Bo thứ 2 bằng

The mass of a muon is 207 times the electron mass; the average lifetime of muons at rest is 2.21 μs. in a certain experiment, muons moving through a laboratory are measured to have an average lifetime of 7.04 μs. for the moving muons, what are (a) β (b) k, and (c) p? the rest energy of the electron is 0.511 mev.

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

Find the magnetic field a distance r from the center of a long wire that has radius a and carries a uniform current per unit area j in the positive z direction.