178k views
3 votes
As long as there is no addition or removal of water vapor, the relative humidity of unsaturated (clear) air rises as the air temperature falls. Hence, on a clear, calm day, the relative humidity is ______ near sunrise, the coldest time of day.

dewpoint
precipitation point
frost point

1 Answer

2 votes


\large\underline{\textsf{Background Information.}}


\textsf{In this scenario, there's a system that pushes down air from the atmosphere.}


\textsf{This air is usually dry, which resembles air you might see from a cold front,}


\textsf{however, since there are clear skies, this air warms up quickly due to the Sun.}


\large\underline{\textsf{Identifying the Best Option.}}


\textsf{From the options provided, we want to identify from the options provided what}


\textsf{the humidity is closest to.}


\large\underline{\textsf{What is Humidity?}}


\textsf{Humidity represents the percentage of water vapor in the air at a temperature.}


\textsf{Knowing what humidity is, we can say that the frost point is incorrect. Frost}


\textsf{point is the vapor pressure of water over a wet surface such as ice. Similar to}


\textsf{Dewpoint, it's also the vapor pressure of water however over a water surface.}


\textsf{Frost point is incorrect since we know nothing about the temperature outside}


\textsf{and precipitation point is incorrect since the conditions make it impossible for}


\textsf{any precipitation to form. It's also likely the


\textsf{up. Therefore, the correct answer is \boxed{\sf dewpoint.}}


\large\underline{\textsf{Alternate Question:}}


\textsf{As long as there is no addition or removal of water vapor, the relative humidity}


\textsf{of unsaturated (clear) air rises as the air temperature falls. Hence, on a clear,}


\textsf{calm day, the relative humidity is \boxed{\sf ?} near sunrise, the coldest time of the day.}


\underline{\textsf{Answer Choices:}}


\textsf{Highest.}


\textsf{Lowest.}


\textsf{As the temperature falls, the humidity increases as the temperature is getting}


\textsf{closer to the dewpoint. Hence, the answer is \boxed{\sf highest.}}


\Large\boxed{\textsf{Answers:}}


\textsf{Hence, on a clear, calm day, the relative humidity is closest to the \boxed{\sf dewpoint}}


\textsf{near sunrise, the coldest time of the day.}


\textsf{Hence, on a clear, calm day, the relative humidity is \boxed{\sf highest}} \ \textsf{near sunrise, the}


\textsf{coldest time of the day.}

User Supun Madushanka
by
8.1k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories