The more arms it has the less of a chance the prey has to swim away.
So we want to know what will happen if we put a magnetically soft material in a strong magnetic field. A magnetically soft material is a material whose magnetic field can easily be reversed. Those are ferromagnetic materials. Iron is such a material. When a magnetically soft material is placed into a strong magnetic field it gets its own magnetic field. But its not a permanent magnetic field, it can be changed by a different strong magnetic field.
Water must absorb energy in order to melt, evaporate, or get warmer.
F=ma, so 100=m×10. Solve for m by dividing by 10. The mass is 10 kg.
