A Maglev train is powered by magnetism and electricity. A student wants to build a model of this train. Which test will best determine if the model train works?
Attach the train to an electric fan
Oь
Oc
Connect the train to a solar panel
Connect the train to an electromagnet
Connect the train to a rocket
I’m

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.)