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A five-year-old boy hurts himself while playing with his toys and immediately begins to cry.His father walks over to him and says: "Don't be a sissy,boys don't cry." This is an example of:
Conductive Materials
Substances that permit the flow of electric current through them due to the presence of free charge carriers like electrons or ions.
Through-beam Photoelectric Sensor
A sensor that detects the presence of an object when the object interrupts a beam of light between transmitter and receiver components.
Light Beam
A narrow projection of photons, typically visible to the human eye, used in various applications from communication to measurement.
Latching Relays
Electromechanical switches that maintain their position (on or off) after being actuated, until they receive another specific actuation signal.
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