4th Grade Science Quiz
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WAVES AND THEIR APPLICATIONS
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Keisha and Amir need an emergency alert system with three messages. Solution A uses a phone vibration pattern: short-short = "medical," long-long = "lost," short-long = "danger." Solution B uses colored cards: red = "medical," yellow = "lost," black = "danger." Criteria: conditions (must be silent) and speed. Which solution would be better if it must stay silent?
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