At what distance from a long, straight wire carrying a current of 8.7 a is the magnetic field due to the wire equal to the strength of earth’s field, approximately 5.4 × 10−5 t? the permeabilty of free space is 1.25664 × 10−6 t · m/a. answer in units of cm.

Hydrogen atoms are excited by a laser to the =4n=4 state and then allowed to emit. what is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? 8 6 2 7 4 5 1 3 calculate the wavelength of the 4⟶14⟶1 transition. =λ=