Each year in the United States, producers harvest almost 100,000 metric tons of which of the following?
a. Catfish c. Tilapia
b. Bass d. Trout
A
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Most disaster-related loss occurs because of physical damage to property.
Answer the following statement true (T) or false (F)
The basic principles that allow an electric motor to operate include all of the following except:
a. electric current creates a magnetic field. b. magnetic poles attract and repel each other. c. electric current closes the magnetic field. d. current direction determines the magnetic poles.
¿Qué tipo de material es el MÁS usado para los tubos de agua fría?
a. Plástico b. Acero inoxidable c. Cobre d. Hierro fundido
____ are caused by voltages induced into the conductors and other surrounding metal parts.
A. Hysteresis currents B. Skin currents C. Dielectric currents D. Eddy currents