Mass: It is the amount of matter in an object. The SI Unit is kilogram(kg).
Standard of Mass: The kilogram is a cylinder of special metal about 39 millimeters wide by 39 millimeters tall that serves as the world's mass standard.
The instrument used to measure mass is physical balance and electronic balance.
It works on the principle of moments. It consists of a light and rigid beam of brass, a metallic pillar, a wooden base, two pans, a metallic pointer and an ivory scale. The plumb line indicates whether the balance is horizontal. In ideal condition, the plumb line is aligned with the end of the knob fixed with the pillar. When the beam is horizontal the pointer remains on zero mark on the ivory scale. The whole box has leveling screws at the bottom to set it to horizontal. The device is enclosed in a glass box to avoid wind effects.
UNIT CONVERSION OF MASS:
