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What is the relative humidity of a room having a dry bulb 72 degrees F and a wet bulb temperature of 59 degrees F?
answer is
Dry bulb temp is the?
The ordinary thermodynamic temperature of the air, what you would measure with a regular thermometer. This is in contrast to the wet bulb temperature, which is the temperature reached by a wet surface. A classical weather station uses a sling hygrometer to measure the two. This is a pair of thermometers, one of which has a wet covering, something like a sock that can be dipped in water. By measuring both of these the humidity can be determined. Temperature of the free air as measured with a dry thermometer on a sling psychrometer over a grassy surface at a height of approximately 6 feet (1.8 meters).
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.
How do you use hygrometers?
Fill the water bottle and screw it on to the instrument. Then hang the hygrometer (by the loop at the top) on a wall or a tree, for instance, for at least five to 10 minutes before taking the measurements. Ideally the instrument should be in a well-shaded spot or in a Stevenson screen (refer to "Making your own weather station" in Section 4: Contacts and further information). The instrument contains two alcohol-in-glass thermometers with a scale of minus 10 to plus 110 degrees Celsius, in 1 degree increments. The end of the 'wet-bulb' thermometer is covered with a damp cloth dipped in water. The other thermometer is the 'dry-bulb'. 6 Record the wet-bulb and dry-bulb temperatures. 6 Calculate the wet-bulb depression - the dry-bulb temperature minus the wet-bulb temperature. 6 Determine the relative humidity (%) using the table (reverse page). Read down from the wetbulb depression and across from the dry-bulb temperature. do's and don'ts Be careful with the instrument. The thermometers are made of glass and can easily break. Empty the water bottle before returning the hygrometer to its box. how it works The hygrometer works on a similar principle to the whirling psychrometer. The main difference is that the hygrometer is not rotated, so evaporation from the damp cloth around the wet-bulb thermometer occurs more slowly.
Can you control inside temperature of bulb when it is glowing.?
I hope temp inside the bulb can be control by varying the input voltage and monitoring it be Infra red thermometer. But it may possible that illumination of bulb get affected.
When the dry bulb temperature is 22 and the wet bulb temperature is 13 the relative humidity is?
The relative humidity is about 45%.
When the dry-bulb temperature is 22c and the wet-bulb temperature is 13c the relative humidity is?
To calculate relative humidity, you can use a psychrometric chart or formulas. At a dry-bulb temperature of 22°C and a wet-bulb temperature of 13°C, the relative humidity is approximately 47%. This indicates the amount of moisture in the air compared to the maximum moisture the air can hold at that temperature.
What is the relative humidity when the dry-bulb temperature is C and the wet bulb temperature is C?
50 percent
What equipment would you need to perform an experiment that measures relative humidity?
To measure relative humidity, you would need a hygrometer, which can be a mechanical or electronic device. In addition, you may need a source of temperature data as relative humidity is temperature-dependent. Optionally, you might use a psychrometer, which consists of two thermometers – a dry-bulb and a wet-bulb – to calculate relative humidity based on the temperature difference.
What is the dew point when the dry bulb temperature is 14C and the dry bulb temperature is 8C?
To calculate the dew point, we need both the dry bulb temperature and the relative humidity. Please provide the relative humidity in order to determine the dew point.
Will the relative humidity be high if the wet-bulb depression increases?
No, the relative humidity will be low if the wet-bulb depression increases. Wet-bulb depression is the difference between the dry-bulb temperature and the wet-bulb temperature, and a higher wet-bulb depression indicates drier air.
What is the significance of wet bulb temperature?
dry bulb temperature simply tells us the temperature of dry air.but the comfort also depends on humidity ie. water vapour presents in the air.Wet bulb temperature measures the humidity in the air.Because the evaporation of water in the bulb wick depends on the relative humidity of surrounding air.
On a cold winter day the air temperature is 2C and the wet-bulb temperature is -1C What is the relative humidity at this location?
51%.... open to the Relative Humidity chart in the reference tables. the wet bulb temperature is -1C and the dry bulb temp. is 2C, making a difference of 3C. On RH chart, go down to 3C column (difference between the Wet bulb and dry bulb) until it intersects the dry bulb 2C. At this intersection is 51%
What step should you follow to measure humidity with a psychrometer?
A sling psychrometer (or hygrometer) uses the difference in readings between a wet bulb thermometer and another with a dry bulb to measure the relative humidity. The bulb that is wet will cool by evaporation to the "dew point", which is the temperature at which the current humidity would be the maximum possible. Comparing that to the dry bulb (the general air temperature) on a comparative chart will yield the approximate relative humidity.
What is the relative humidity of a room having a dry bulb 72 degrees F and a wet bulb temperature of 59 degrees F?
answer is
What type of humidity is a pyschrometer used for?
A psychrometer is typically used to measure relative humidity, which is the amount of water vapor present in the air relative to the maximum amount the air could hold at that temperature. By measuring both the dry-bulb (air temperature) and wet-bulb temperature, a psychrometer can determine the relative humidity of the air.
What is the relative humidity if at 3 pm a dry-bulb thermometer reading is 66 degrees F and the wet-bulb reading is 66 degrees F?
The relative humidity is 100% because the dry-bulb temperature and wet-bulb temperature are the same, indicating that the air is saturated with moisture and cannot hold any more water vapor.
