Balance scale

A balance scale is a device used to compare the weight of two objects. It has two pans hanging from a horizontal beam that is balanced at the center. When you place an object on one pan and known weights on the other, the scale tilts until both sides are level, indicating the weights are equal. This allows for precise measurement of an object's mass by adjusting the known weights until balance is achieved. Balance scales are commonly used in laboratories, shops, and for scientific purposes to ensure accurate weight comparisons.