How might the reversal of Earth's magnetic poles affect life on Earth? Make sure to consider the role that the magnetic poles play in daily life and the importance in activities such as navigation.

the bal will not change its velocity.

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)