In what form does energy propagate down a waveguide?
A. Radio signal
B. Magnetic field
C. Radar pulse
D. Doppler radar
A
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Express 12/7 as a mixed number.
A. 7/9 B. 1 1/9 C. 1 1/7 D. 1 5/7
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The atmosphere extends from the Earth's surface to a height of about ____ miles above sea level
A) 243 B) 348 C) 16 D) 1,299
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?What can cause porosity (tiny bubbles) to form on some welds on mild steel?
A. ?A chemical reaction between the filler metal and the mild steel. B. ?Using the wrong type of tungsten electrode. C. ?Small pockets of CO2 trapped inside of the steel during manufacturing. D. ?Too much heat and the metal begins to boil.
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Can C02 be effectively injected during darkness and why?
What will be an ideal response?
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