What type of balance features unlike objects on either side of imaginary line?

The type of balance that features unlike objects on either side of an imaginary line is called a " beam balance" or "equal-arm balance." In this setup, different weights or objects are placed on either side of a horizontal beam to compare their mass. The balance indicates equilibrium when the weights on both sides are equal, regardless of whether the objects are identical or different. This is commonly used in laboratories and educational settings to teach principles of mass and weight.