A boat is traveling 12m/s East along a river that pushing the boat with a velocity of 8m/s South, what would angle used to describe the resultant velocity (just the angle without any other direction)? a)40°
b)34°
c)25°
d)17°

a=d/t

a="triangle"v/t

explanation:

a = acceleration

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.