A balanced scale, which compares the mass of one object with that of a known quantity.
A balance.
This instrument is a balance.
This instrument is an adequate type of balance.
mass
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balance machine
Triple Beam Balance.
An aerometer is an instrument used to measure the mass and density of gases.
This is the analytical balance.
a viscometer is used to determine viscosity(density) of a liquid.
In layman's terms "mass" means weight. The measurement is expressed in grams, and to measure mass, a scale is used.
A Balance in Science is an instrument used to measure mass.
Mass is measured with weight, a graduated cylinder, and a scale.