Calculate the relative humidity and dew point

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Reference no: EM133191016 , Length: Word count: 2 Pages

Question 1: Water Vapor and Its Changes

Please read this section and answer these short questions, which are based on it.

a. Of the six phase changes of water substance, which ones would work to increase the dew point of a parcel of air?

b. Consider a pot of water on a hot stove. The water has been heated to 212°F. Why will a thermometer inserted into the water never read higher than 212°F? If you leave the pot of water on the stove, where is all that extra heat going? Do not write more than a couple sentences.

c. Draw a surface station model for a morning in Bloomington where you would see DEW on the grass.

d. Draw a surface station model for a morning in Bloomington where you would see FROST on the grass.

Question 2: Relative Humidity Calculations

Calculate the relative humidity (in percent) in each of the following scenarios. Round your answers to the nearest integer. If you do not show your work - including the mixing ratios, proper units, and so on - you will get no credit if there is a mistake.

a. T = 90°F; Td = 70°F

b. T = 10°F; Td = 3°F

c. T = 10°C; Td = 3°C

Question 3: Wildfire Risk

On a recent morning in southern California with a high risk of wildfires, the temperature was 75°F. Normally, we consider wildfire risk to be "high" if the relative humidity goes below about 25%. What would the dew point be in such a scenario? Show each step of your work, and give a final answer in °F.

Question 4: Relative Humidity Range

If the temperature is 80°F, what is the complete range of possible values of relative humidity if you know the dew point is at least 60°F? (Your answer will be a range: for example, "RH could be anywhere from 17% to 36%.")

Reference no: EM133191016

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