When calculating the specific gravity of gas, the substance used as the comparative constant in the formula is:
A) Air. B) Nitrogen. C) Natural gas. D) Oxygen.
A
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Dimensions given on views that have a(n) ____________________ break are the true sizes.
Fill in the blank(s) with the appropriate word(s).
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Which of the following statements about hydrogen is true?
A. A hydrogen atom is one proton and two electrons. B. Hydrogen is one of the heaviest elements known and is full of energy. C. Fossil fuels are combinations of carbon and hydrogen. D. Hydrogen is produced in a fuel cell when water is broken down into its basic elements.
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Why does some of the refrigerant liquid flash vaporize in the metering device?
What will be an ideal response?
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The first cloned animal was a:
A. dog B. sheep C. horse D. tadpole
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