You weight it.
The amount of mass in a certain volume of matter is called density. Density is calculated by dividing the mass of an object by its volume, and it represents how much mass is contained in a specific amount of space.
mass = volume X density
Mass.
The amount of matter (mass) in a certain amount of space (Volume).
It has like more dense
Mass per unit volume is the object's "Density".
Density is the amount of mass in a certain unit volume of a substance (Density equals mass divided by volume).
The amount of mass an object has in a certain volume is known as its density. Density is calculated by dividing the mass of the object by its volume. It is typically measured in units such as grams per cubic centimeter (g/cm³) or kilograms per cubic meter (kg/m³).
mass is the amount of matter (stuff) you're made out of, so it won't change unless you add or subtract something.
Properties which a certain amount of gas will maintain include its mass, and the number of moles.
If you know the velocity and the mass, you can use the formula: KE = (1/2) x mass x velocity2. Otherwise, you have do deduce it from other facts. For example, if an object of a certain mass falls from a certain height, you can calculate that it started with a certain amount of potential energy, and assume that after it falls, all of the energy has been converted to kinetic energy.If you know the velocity and the mass, you can use the formula: KE = (1/2) x mass x velocity2. Otherwise, you have do deduce it from other facts. For example, if an object of a certain mass falls from a certain height, you can calculate that it started with a certain amount of potential energy, and assume that after it falls, all of the energy has been converted to kinetic energy.If you know the velocity and the mass, you can use the formula: KE = (1/2) x mass x velocity2. Otherwise, you have do deduce it from other facts. For example, if an object of a certain mass falls from a certain height, you can calculate that it started with a certain amount of potential energy, and assume that after it falls, all of the energy has been converted to kinetic energy.If you know the velocity and the mass, you can use the formula: KE = (1/2) x mass x velocity2. Otherwise, you have do deduce it from other facts. For example, if an object of a certain mass falls from a certain height, you can calculate that it started with a certain amount of potential energy, and assume that after it falls, all of the energy has been converted to kinetic energy.