A car collides with a stationary car of the same mass and they stick together. Describe the motion of the wreckage immediately after the collision. A:
The wreck will move with the same velocity as the initial car.
B:
The wreckage will be stationary.
C:
The wrechage will move with half the velocity of the inital car.
D:
The wreckage will move with twice the velocity of the initial car.

tube or goog with be a great resource to with that question

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.

the answer is 100. i just did this lesson and got a 100% on it. : )

-fishtank