The percentage humidity is less than the relative humidity only at __________________ percent humidity?

Correct answer: C. Both zero and hundred

  • A. Zero
  • B. Hundred
  • C. Both zero and hundred
  • D. None of these

Explanation

Percentage humidity is lower than relative humidity because humidity ratio uses the denominator for saturated vapour, while relative humidity uses vapour pressure directly. They become equal at both completely dry air, 0%, and saturation, 100%.

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