Acomet near the sun whose orbit is would never be near the sun again

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

The energy produced as a result of this flow of electrons from atom to atom is called

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.)