Diagram A is the correct diagram
all the allials must be aligned in the same direction
magnets are affected by heat, drops, and improper storage
When a magnet is dropped, the domain become unaligned.
Answer:
v = 7934.2 m/s
Explanation:
Here the total energy of the Asteroid and the Earth system will remains conserved
So we will have

now we know that





now from above formula

now we have

now plug in all data

