The earth can be approximated by a sphere of radius 6370 km. If a person stood on a scale on the North Pole and observed the scale reading
to be mg where the person’s mass was m and the acceleration due to
gravity is g, what would the scale reading be if this same person stood on
the scale on the equator?

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.