The free-fall acceleration on the surface of mercury is about three eighths that on the surface of the earth. the radius of mercury is about 0.375 re (re = earth's radius = 6.4 106 m). find the ratio of their average densities, ? mercury/? earth.

The summit of chimborazo, in ecuador, which is at a distance of about 6,384 km from the earth’s center. the bottom of the mariana trench, in the western pacific ocean, which is nearly 6,370 km from the center of the earth. on the surface of earth on the equator line.

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.

The junction rule describes the conservation of which quantity? note that this rule applies only to circuits that are in a steady state.