Which three functional units are essential in measuring all physical quantities?

The three functional units essential in measuring all physical quantities are length, mass, and time. These units are foundational because they represent the core dimensions used to define a wide variety of phenomena in both physical and engineering contexts.

Length is a fundamental measure that defines spatial dimensions. It is critical for calculating distances, areas, and volumes. This measurement is used across numerous applications, from construction and design to physics and geography.

Mass is another core unit that quantifies the amount of matter in an object. It is crucial for understanding weight, density, and the behavior of objects under the influence of forces (as described by Newton's laws). Mass measurements are vital in fields such as chemistry, where reactions depend on the quantities of reactants.

Time is the third element in this essential set, representing the progression of events. Time measurements are crucial for any scientific endeavor, as they provide the context within which phenomena occur. This measurement is important in areas like kinematics, dynamics, and thermodynamics, among many others.

Together, these three units (length, mass, and time) form the basis for more complex measurements and relationships in various fields of study, including instrumentation and engineering. They interact with one another to describe motion, energy, and material properties, making them