Which of the following statements describe a perfectly in elastic collision A) two billiard balls bounce off each other
B) a wad of chewing gum is thrown and sticks to a moving truck
C)Two ice skaters hit each other and fall over in opposite directions
D) a car crashes into a tree and rebounds in the other direction

i think the answer is a and b

i wish you luck

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000

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.