Is radioactivity physical or chemical property?

It's a physical property.

"Non nobis Domine, non nobis, sed Nomini, tuo da gloriam."

Regards M.Y.

Answer: buoyancy forceexplanation: in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.

By dividing you can find the answer