Compared to Air, the Density of an 80% He and 20

question 54

Multiple Choice

Compared to air, the density of an 80% He and 20% O₂ mixture is about which of the following?

• A)two-thirds as much
• B)one-half as much
• C)one-third as much
• D)one-fifth as much

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Definitions:

Absolute Threshold

The minimum intensity level of a stimulus required for it to be detected by an organism's sensory receptors 50% of the time.

Arbitrary Value

A value or figures assigned based on random choice or personal whim, rather than any reason or system.

Upper Limit

The maximum level or point that is considered acceptable or achievable.

Absolute Threshold

The minimum intensity of a stimulus that can be detected by the senses at least 50% of the time.