i run around a circular track, with a radius 25 m, for 4 and 1/4 times without stopping. it takes me 16 minutes. A) what is my speed? B) what is my 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.)

i believe the answer is electric potential.

explanation:

+15-35=-20

going in opposite directions

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.