Answer:
the third one, measured or observed without changing the identity and composition of matter. because physical property does not under go any change but can be put back.
In Thompson's model, an atom is made of protons and electrons. Protons carry simplest positive charge, while electrons carry simplest negative charge thus being the simplest negative particle in an atom.
Density of Mercury = 13.6 g/ml
Volume of mercury = 18.0 ml
Weight of Mercury = ?
By using the formula
Density = Mass / Volume or
D = M / V
M = D x V
Putting the values of D and V
M = 13.6g/ml x 18.0ml
M = 244.8 g
So the Mercury weighs 244.8 g
Density is a value for mass, such as kg, divided by a value for volume, such as m^3. Density is a physical property of a substance that represents the mass of that substance per unit volume. It is a property that can be used to describe a substance. It is important in industries because it can be used to determine other characteristic of a material. Changes in density of a substance also would help observers conclude the effect of certain conditions to a substance.
Explanation:
It is the motion of particles that creates a form of energy called heat (or thermal) energy that is present in all matter. Tiny particles in solids, liquids and gases are always in motion. It is the motion of particles that creates a form of energy called thermal (heat) energy that is present in all matter.