gyro-magnetic compass.
The gyromagnetic ratio is a physical constant that relates the magnetic moment of an atom's nucleus to its angular momentum. It is an important factor in determining the behavior of nuclear magnetic resonance and electron spin resonance. The gyromagnetic ratio is key in understanding how nuclei interact with magnetic fields in various applications, such as magnetic resonance imaging and spectroscopy.
The gyromagnetic ratio of silicon is approximately 2.2126 x 10^10 rad T^-1 s^-1. It is a physical constant that describes the relationship between the magnetic moment and the angular momentum of a nucleus in a magnetic field.
If your unable to figure out how to work a compass its probably best not to use it.
Because he portable sundial does not work without a compass
Because he portable sundial does not work without a compass
The compass indicates the direction of magnetic North, from that you can work out South, East, West and all the other points on the compass.
The iPhone's digital compass application works just like any magnetic-needle compass. Launch the application by tapping the "Compass" button on the iPhone's.
Bronze
the clock is rotating like the sun and that's how a compass works in physical education.
then make a compass
Why not? the desert is just the same as any other place on planet earth. Magnetic compasses work fine in the desert. See the "Where does the magnetic compass not work?" question for some places where they don't work.
Rather than type a long answer - see the related link from Wikipedia for their entry on a gyro-compass.