Which of these statements best describes an effect of changes in earth's magnetic field?

southern lights are seen at high altitude places like alaska.

northern lights are seen at low latitude places like michigan.

the solar wind moves away from earth towards other planets.

the magnetic north and south poles of earth are interchanged.

The magnetic north and south poles of Earth are interchanged.

Explanation:

Earth acts as a huge bar magnet due to the presence of iron and nickel in its core. The magnetic field surrounding Earth is known as magnetosphere which constantly protects from solar wind. Auroras are visible in the sky when charged particles from the sun interact with the magnetic field of the earth especially near the poles where strength of the magnetic field is maximum.  

Over the years, the magnetic field might weaken as it is continuously repelling the charged particles from the Sun. As a consequence, the poles of this magnetic field might reverse.

Thus, changes in Earth's magnetic field can reverse the poles.

harry byrd declared organized resistance by southern states would prevent racial integration.

force is mass*acceleration.

we have a very small mass: 11.4*0.001 kg

if we want 0.035n of force, we need an acceleration:

0.035 = 11.4*0.001*a

a = 0.035/(11.4*0.001) m/s^2