If your mass is 63.7 kg, and you are standing 7.5 m away from a boulder with a mass of 9,750.6 kg, what is the gravitational force between you and the
boulder? Newton's law of gravitation is F gravity
Gm; m2. The gravitational
constant G is 6.67 x 10-11 Nm2/kg?

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.)