Within a lightning bolt, current flows _____.
A. from positive to negative
B. from negative to positive
C. in both directions
Answer: B
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Fuel cells can be used in any application that we currently use ____.
a. geothermal energy b. thermal energy c. batteries d. carbon
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A five-wire actuator uses two wires to power the motor (power and ground) and three wires for ________.
A) Redundant control B) Direction control C) A feedback potentiometer D) Static electricity protection
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How do thermocouples work?
What will be an ideal response?
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What is rapid up-and-down movement of the wheel called?
What will be an ideal response?
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