| http://www.w3.org/ns/prov#value | - Gravity is a force, and thereby a constant acceleration downwards on a mass. so with x y and z accel in the standard configuration, if the badge was perfectly level the x and y accels would read 0, and the z would read -1 G. If I tilt the badge 45 degrees to the left, the x will read .5G and the z will read -.5G. So by taking the arctangent of y/z and x/z, I can tell what angle the badge is tiltin
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