Question

Suppose the two thermometers on a sling psychrometer show almost identical readings. Was the psychrometer more likely used on a Florida beach or in an Arizona desert? Explain your answer.

Answer 1

Remember that the two temperatures will be most different if evaporation is taking place rapidly, as this process absorbs heat faster than if little evaporation is taking place. In which location would you expect this to happen?

Answer 2

The psychrometer was used on a Florida beach.

A sling psychrometer is a measuring instrument that is made up two thermometers:

• wet bulb thermometer and
• Dry bulb thermometer.

The primary use of this thermometer is to measure the relative humidity of an area.

The Florida beach is high relative humidity because of the presence of the beach while the Arizona desert is low in relative humidity because water is rarely found in a desert.

Relative humidity is the amount or quantity of water vapor in the air.

To determine the relative humidity of an area, the reading in the both thermometers on the sling psychrometer is read and compared.

If the reading of the two thermometers on the sling psychrometer shows almost an identical reading then then the relative humidity of that area is high.

If there is a great difference between the two readings then the relative humidity of the area is low.

Therefore, the psychrometer was more likely used on the Florida beach.

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