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Systems S and S' are in relative motion as indicated in the sketch. Metersticks and clocks in S' agree with metersticks and clocks in S when t = t' = 0. An observer in S' notes that two events occurring at x1' and x2' are simultaneous; i.e., Δx' > 0 and Δt' = 0 for the observer in S'. An observer in S, seeing the same two events, may find that
Mental Illness
A broad range of mental health conditions that affect mood, thinking, and behavior.
Abusive Relationship
A relationship characterized by one partner exerting control and power over the other, often manifesting in physical, emotional, sexual, or psychological abuse.
Substance Abuse
The misuse of drugs or alcohol that leads to significant distress or impairment in functioning.
Structural-Functional Family Theory
A concept in sociology that views the family as a complex system with parts working together to maintain stability and balance.
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