7200 grams is what equivalen to 7.s kilograms
Of the important biological molecules only the non-polar lipids (fats and oils) and large polymers (e.g. polysaccharides, large proteins and DNA) do not dissolve. The water acts as a solvent for chemical reactions and also helps transport dissolved
That could be an electromagnet,
and it could also be an solenoid.
Spiral
Hope this helps! c;