Two vinyl balloons, each having the same charge are separated by a distance 0.41 m. The balloons exert a repulsive force of magnitude 2.23 N on each other at this distance. Calculate the magnitude of charge on each balloon Give your answer in microcoulombs.

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.)