Two balloons, one with a charge of 4.0 x 10 coulombs and the other with a charge of 8.2 x 106 coulombs, are kept 2.0 meters apart. What is the electric force between the two balloons? (k = 9.0 x 10^9 newton-meter^2/ coulombs^2)
A. 4,0 x 10^-2 newtons
B. 5.2 x 10^-2 newtons
C. 7.3 x 10^-2newtons
D. 8.2 x10^-6newtons

Which are advantages of renewable resources? check all that apply. renewable energy supplies are completely reliable everywhere. some renewable resources will never be used up. little or no waste is produced by renewable resource plants. electricity can be generated in large quantities. many renewable energy facilities have lower operating costs.

How many neutrons does plutonium -196 with an atomic number of 78.

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.)