The "parallel plate" field plate used in this lab has two parallel conductors separated by (6.70 ± 0.05) cm. If the electric potential difference between the two parallel plates is (8.0 ± 0.5) v, what is the magnitude of the electric field between the plates with an error estimate. Present the answer in appropriate significant figures, as well as proper error propagation / estimates.

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.)