Examine the diagram below. Motion of an Object

Which of the following statements is true of the above graph?

A.
An object is standing still on the origin.
В.
An object is standing still at a distance of 6 meters from the origin.
C.
An object is moving at a variable speed away from the origin.
D. An object is moving at a constant speed of 6 m/s away from the origin.

Certain bacteria (such as aquaspirillum magnetotacticum) tend to swim toward the earth’s geographic north pole because they contain tiny particles, called magnetosomes, that are sensitive to a magnetic field. if a transmission line carrying 100 a is laid underwater, at what range of distances would the magnetic field from this line be great enough to interfere with the migration of these bacteria? (assume that a field less than 5% of the earth’s field would have little effect on the bacteria. take the earth’s field to be 5.0 * 10-5 t, and ignore the effects of the seawater.)