Which of the following is NOT a vector quantity?

Temperature is classified as a scalar quantity, which is characterized by having only magnitude and no direction. Scalars are fully described by a numerical value alone, such as temperature measured in degrees Celsius or Kelvin. In contrast, vector quantities, such as acceleration, force, and displacement, have both magnitude and direction. For example, acceleration could be described as "5 m/s² to the east," showcasing both how much and which way the acceleration is occurring. Understanding the distinction between scalar and vector quantities is essential in physics, as it affects how we analyze and solve problems involving motion and forces.