Units, Dimensions, and Scalar Quantities in Physics

• Units and dimensions both refer to the measurement scale
• Dimensions refer to the measurement scale, while units refer to the physical quantity being measured
• Units refer to the measurement scale, while dimensions refer to the physical quantity being measured (correct)
• Units and dimensions are interchangeable terms

• A quantity that represents a physical dimension
• A quantity that is fully described by its direction and has no magnitude
• A quantity that has both magnitude and direction
• A quantity that is fully described by its magnitude and has no direction (correct)

• Examining the relationships between different physical quantities by analyzing their dimensions (correct)
• Studying the dimensions of fundamental particles
• Analyzing the units of measurement for a given quantity
• Finding the dimensions of an object in space