Final answer:
In physics, the object of interest can be anything studied by the science, like a smartphone's electrical circuits or the concepts of quantum mechanics and relativity. Physics uses both qualitative and quantitative analyses to understand the universe from the subatomic to the cosmic scale.
Step-by-step explanation:
The object of interest in physics can refer to a wide range of entities, phenomena, or concepts that are studied within the field. Physics is deeply concerned with understanding the fundamental behaviors and interactions of energy, matter, space, and time. It is a science that strives to explain how our universe operates at the most basic levels, from the subatomic to the cosmic scale. Objects of interest in physics could be as minuscule as quarks or as massive as galaxies.
For instance, consider the ubiquitous smartphone. Physics helps us understand how electrical currents flow through circuits, enabling engineers to design and fabricate these devices efficiently. Similarly, physics principles are employed in a GPS to calculate the distance and time relationship for travel using equations that describe the speed of objects. The application of physics doesn't end with small gadgets; it extends to studying the microcosm of quantum mechanics and the macrocosm through relativity.
Physics provides both qualitative and quantitative analyses of natural phenomena. It uses mathematical equations and principles to offer deeper insights than qualitative descriptions alone. In doing so, it allows us to measure, predict, and potentially control aspects of the physical world.