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yes
Yes, in fact small things like bacteria, dust, etc. float in mid-air.
Objects having very small thickness.
Yes, gravity affects all objects that have mass.
The gravity depends on the mass.
yes
no
duckweed is small and can float easily
they should expand but in a very small amount
Yes, in fact small things like bacteria, dust, etc. float in mid-air.
Float
That would make the net force on the object zero. In that case, a small push will move the object downwards, upwards, or indeed in any other direction.
Small objects, like small fish bones, can cause you to choke.
Float valve or float are bad , letting carb overflow into crankcase .
Float on your back on the upstream side of the craft.
Fear of small objects is tapinophobia.
You have a small person under the small parachute.