It's spikes
The swim bladder keeps the fish upright in water.
no
When the ship sank I used a lifebelt to help me keep afloat.
tail
Glaze and fat
The lateral line belongs to the lateral line system. This helps to stream line fish in water and to keep them afloat.
They are filled with air, which is less dense than water, therefore keeping you afloat.
To find the upthrust needed to keep a 1600 N object afloat, you need to consider the weight of the object. The upthrust must equal the weight of the object for it to stay afloat, so the upthrust required would be 1600 N.
Wearing a life jacket does not affect your density, but it helps you float in water by providing buoyancy. The life jacket displaces water and helps keep you afloat, reducing the risk of drowning.
No, not the ones deployed in an accident.
It is to keep a plant or seaweed afloat on water.
To keep afloat