Ford has beaten General Motors for the first time in nearly a century, in terms of number of US factory workers. Ford has 50,703 to GM's 50,300 or so.
Answers. Well, the simplest answer is that the astrolabe pretty well had to be used at night and could not be used in bad weather. The compass, which relys on the magnetic field of the Earth rather than a visualiztion of the stars, works at any time, and in any weather.
because the magnetic field direction indicated by the compass deflection when the circuit. is closed is a superposition of the Earthâs magnetic field and the wireâs, the deflection. angle is not as simple as the 1/r dependence of the field due to the wire alone [4, pg. 527].