Answer:
Balances and Scales
A balance compares an object with a known mass to the object in question. One example of a balance is the triple beam balance. The standard unit of measure for mass is based on the metric system and is typically denoted as kilograms or grams.
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Length
Time
Mass
Temperature
Energy
Direct Current (DC)
Frequency
Volume
Speed
Amount of substance
Luminous Intensity
Density
Concentration
Refractive Index
Work
Pressure
Power
Charge
Electric Potential
Entropy
Density=Mass/Volume
=20/4 kg/m^3
=5 kg/m^3
