What is the name of a straight line passing through a circle and intersecting the circle at two points?
Fill in the blank(s) with the appropriate word(s).
secant
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The three sections of switchgear enclosures are the front section, the bus section, and the _____.
a. interrupter section b. unit substation c. cubicle section d. cable or termination section
Muscador albus may be the first biological fumigant
Indicate whether the statement is true or false
A welding symbol consists of a small horizontal rectangle whose upper length is on the reference line. Below the rectangle is the designation 25°. To the left of the rectangle is the notation 3/4. What does this symbol mean?
A. This is a plug weld, which is to fill a hole in one piece of metal that is lapped over another piece of metal. The hole is 3/4 inch wide at the top. The weld will have an overall angle of 25° from the top of the weld to the bottom of the weld. B. This is a slot weld, which is to fill a slot in one piece of metal that is lapped over another piece of metal. The slot is 3/4 inch wide at the base. The weld will have an overall angle of 25° from the base of the weld to the top of the weld. C. This is a plug weld, which is to fill a hole in one piece of metal that is lapped over another piece of metal. The hole has a 3/4 inch wide diameter. The weld will have an overall angle of 25° from the base of the weld to the top of the weld. D. This is a flush weld, which is to fill an outside corner of two pieces of material. The corner is 3/4 inch wide at the base. The weld will have an overall angle of 25° from the base of the weld to the top of the weld. E. None of the above. This is an incorrect symbol.
Multiplying 8.4 times 10 to the power of 7 equals ____.
A. 840,000 B. 8,400,000 C. 84,000,000 D. 840,000,000 E. none of the above