A Weighing scale is an instrument to measure weight of an object. The scale is used to measure the weight of a person, used scientifically to measure the mass of an object, and industrially or commercially to weigh a variety of objects. Some scales measure gravitational force as well as mass.
In physical sciences weight is […]

“Plastic” objects are part of our history. These items represent a significant example of Americana. The Smithsonian, the Museum of Modern Art and the Philadelphia Museum all include “plastics” in their collections.
You do not have to go to a museum to enjoy seeing and collecting “plastic” items. The primary goal of the […]