When an electron moves from one atom to another, it causes a chain reaction. What is the result of this reaction?
A) Electrical current B) Chemical energy C) Thermal energy D) Radiant energy
A
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The most commonly used conductor tubes have a ____ angle.
A. 15° B. 30° C. 45° D. 60°
Which of the following is true about grooves?
A. There are six groove types. B. The groove may not be cut with a saw. C. The groove can only be made on one plate. D. Joint strengths can be improved by making a groove preparation before the joint is welded.
If leaf patterns cast by trees onto the lawn were desired, what type of lighting would be used?
a. up c. down b. shadow d. silhouette
In which of the following is the explorer mismatched with the area he explored?
A. Coronado—New Mexico and Arizona B. Ponce de León—Mississippi River Valley C. Cortés—Mexico D. Pizarro—Peru E. Columbus—Caribbean islands