What happens to water as it is heated?

a. Its density increases.
b. Its density decreases.
c. Its density remains the same.
d. It absorbs air.


b. Its density decreases.

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A metallurgist is designing an experiment to determine the effect of flux, base metal, and energy input on the hardness of a weld. She wants to study four different fluxes, two different base metals, and three different amounts of energy input. If each run of the experiment involves a choice of one flux, one base metal, and one amount of energy input, how many different runs are possible?

What will be an ideal response?

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Which breed of cattle is most popular in Europe?

a. Murray Grey c. Longhorn b. South Devon d. Simmental

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The primary goal of the NFPA is "to promote the science and improve the methods of electrical wiring."

Answer the following statement true (T) or false (F)

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The electrical path to ground may be completed by ________

A) The metal body of the vehicle B) The vehicle frame C) Both A and B D) Neither A nor B

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