Define physical properties then give 3 examples.
no copy write, please.

A physical property is a characteristic of matter that is not associated with a change in its chemical composition.Examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity. We can observe some physical properties, such as density and color, without changing the physical state of the matter observed.

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg

there is none because earth is stationary and flat.