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Which one is always higher wet bulb temperature or dry bulb temperature?
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Why are there two thermometers in a hygrometer?
A hygrometer is used to measure relative humidity. The two thermometers in a hygrometer are different in that one is a "regular" thermometer and the other has some batting (a wrap) around the bulb that is kept wet. The thermometers are called a dry-bulb thermometer and a wet-bulb thermometer, respectively. The dry-bulb thermometer measures "regular" or ambient air temperature. The wet-bulb thermometer will measure a cooler temperature (usually) because moisture evaporating from the wrap around its bulb will cool it down below ambient temperature. Below zero, the wrap freezes and the wet-bulb thermometer will read a higher temperature (usually) than its dry-bulb companion. The dry-bulb thermometer will tell us the actual ambient temperature of the air. It's a very necessary baseline. There is a maximum amount of moisture that air at a given temperature will hold. (Higher air temperatures will allow air to hold more moisture and lower air temperatures will not allow as much.) What we need to know is what fraction (the percentage) of moisture the air is holding relative to the maximun it can hold. That's why we call it relative humidity. It is the wet-bulb reading that is critical now. The hygrometer looks at the difference between the dry- and wet-bulb temperatures. This number, the difference, is looked up on a psychrometric chart, and for a given ambient temperature and a given temperature difference, there is only one relative humidity that will be possible. The psychrometric chart is a calibrated "graph" that has been drawn up from precise laboratory measurements of the way the two thermometers will react for a given ambient temperature and a given temperature difference (which means a specific relative humidity). A link is provided to the Wikipedia article on the hygrometer so you can see some pics and do some additional reading.
When a sling psychrometer is slung around why does the wet bulb become colder than the dry bulb?
Loss of heat of evaporation from the wet bulb. (The reason you "sling it around" is to speed up the evaporation.)
How does a dry cell make a lightbulb light?
When electric current flows through filament of the bulb, the electrons are squased among themselves due to the thin structure of the bulb. This causes them to emit light. Due to the gases filled in the light bulb, the bulb glows.
What is relative humidity reported as?
Relative humidity is reported in percentages. The percentage relates to the amount of water vapor air of a given temperature holds when it is saturated. So the humidity is reported as 50%, if the amount of water vapor in the air is half of what the air could hold at its current temperature.
At what temperature is the absence of heat?
Absance is spelled absence. Heat is a noun used to describe the higher temperature applied or in relation to another something. It isn't really ever absent... FOR EXAMPLE: 32F could be hot compared to dry ice.
Is The wet bulb thermometer reading is always higher than the dry bulb?
No, the wet bulb is always lower. Evaporation from the wet bulb reduces its temperature.
Is the wet bulb thermometer reading always higher than the dry bulb?
No, the wet bulb is always lower. Evaporation from the wet bulb reduces its temperature.
Is the wet bulb thermometer reading always higher than a dry bulb reading?
No, the wet bulb is always lower. Evaporation from the wet bulb reduces its temperature.
What is the dew point when the dry bulb temperature is 14C and the dry bulb temperature is 8C?
-9c
When wet bulb temperature and dry bulb temperature are equal?
for air water system wet bulb equals to dry bulb at 100 % relative humidity for that given temperature of air.
What does a wet bulb and a dry bulb measure?
A wet bulb measures the temperature after water evaporation allows to cool and a dry bulb measures air temperature.
What would the dew point temperature be when the wet and dry bulb temperature are the same?
the "current" temperature, ie, the temperature at which wet bulb and dry bulb are the same. when the wet bulb and dry bulb temperaturs equalized the dew point emperature equals them, because the air is saturated now.
What is atmospheric depression?
it is difference between wet bulb temperature and dry bulb temperature.
What is a temperature depression?
Dry bulb Temperature - Dew Point Temperature
Why did the wet-bulb temperature record a lower temperature then a dry-bulb temperature?
the evaporation off the moisture on the wet bulb absorbs the heat.
What is the relative humidity when the dry-bulb temperature is C and the wet bulb temperature is C?
50 percent
What would happen if a wet bulb had the same temperature as a dry bulb?
That means that there is 100% humidity. Normally evaporation from the wet bulb keeps its temperature lower than the dry bulb. At 100% humidity, there would be no evaporation, so they would show the same temperature.
