To view an enlarged upright image of an object through a simple magnifier, where must the object be located? Which choice is it below? (A) at the near point (B) at the focal point of the lens (C) within the focal length of the lens (D) between the near point and focal point (E) within the focal length of the lens, provided the focal length is shorter than the near point distance

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.)