Supongamos que tenemos un cilindro A y un cilindro B del mismo material, pero de dimensiones diferentes, siendo el cilindro A de Mayor dimensión que el cilindro B. Si calculamos la densidad del cilindro A en la tierra y luego determinamos la densidad del cilindro B en la luna. ¿Cómo es la densidad del cilindro A respecto a la densidad del cilindro B y justifique su respuesta?

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.)