What kinematic quantities have the same values in different frames of reference?

Characteristics that have the same values in different frames of reference are called invariant. The invariant quantities include the time interval, the length of a segment, a rod, etc.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.