Kyle is flying a plane due north at 225 km/h as a wind carries it due east at 55 km/h. Find the magnitude of the plane's resultant velocity.

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it is b. absorbs thermal energy

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.