Question

you have been given free because of the magnet in which four iron fillings in each one of them and four very cold water in 1 hot water in the second and no water in the third week of which magnet will attract a maximum amount of iron fillings justify your answer

Answer 1

cold water has greater density than hot water

that's why in cold water the magnetic attraction is greater than hot water.
but hot water is also a medium and has greater density than air . that's why the magnetic attraction in the air is smaller than hot water.

ATTRACTION IN
COLD WATER > HOT WATER > AIR