Light is composed of particles called ____.
a. electrons
b. photons
c. semiconductors
d. ions
d. ions
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How are the overload contacts connected in the logic circuit described in this chapter?
What will be an ideal response?
La tubería con sistema de calentamiento:
a. suele no estar aislada. b. utiliza un tamaño de aislamiento superior al tamaño del tubo. c. nunca se utiliza en aplicaciones de temperaturas bajas. d. es más fácil de aislar que los tubos normales.
Before attempting to work with patented form systems, the carpenter must _____.
a. work with an experienced installer b. attend a training course c. figure out how the forms are assembled d. obtain and read the manufacturer's instructions
Which variable resistor is most likely used for a dash light dimmer control?
A) Rheostat B) Piezoelectric C) Potentiometer D) None of these