Why is helium used to fill balloons?

What will be an ideal response?


Helium is used because it is a gas that is nontoxic, nonflammable, and is lighter than air.

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Describe how the Hall effect is produced using the Hall generator.

What will be an ideal response?

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Relative maturity (RM) is a system that denotes the average days to physiological maturity for a particular hybrid

Indicate whether the statement is true or false

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Vacuum pumps are intended to be used on systems that are at or below atmospheric pressure. The technician should avoid using them on systems that are at pressures over __________ psig.

A. 0 B. 196 C. 243 D. 270

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Another name for the three-phase wye connection is the _______________ connection.

Fill in the blank(s) with the appropriate word(s).

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