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A psychrometer gives the same reading on both thermometers what is the relative humidity?
Wiki User
∙ 13y ago
100% because, let's say that both the thermometers have a reading of 66o degrees celcius. 66o is 100% of 66o, so the relative humidity is 100%.
Wiki User
∙ 10y ago
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Why must sling psychrometer be swung in order to obtain the wet bulb reading?
It is cooling by evaporation
What are the errors to use a thermometer?
The fixed error on a non-digital thermometer is 0.5oC. The percentage error is worked out by dividing 50 by the reading you have taken from the thermometer.
Why you have to wait 1 minute after inserting the thermometer into the ice water before starting to record data?
Most normal thermometers are not incredibly accurate and the reading can jump around if there's a sudden change in temp. Mostly though, it will take an ordinary thermometer a little while to adjust to a new temperature. One minute should be enough time for everything to settle down and get a good idea of what the temperature actually is.
What type of thermometer has the smallest graduation and would give the most accurate temperature reading?
A platinum resistance thermometer PRT, is the commonest thermometer with high accuracy. It may have a range from -200 C to +1 000 C, and an accuracy of up to 0.001 C provided it is installed in an appropriate measuring configuration. Similar thermometers are made from nickel (and other metals), but their cost benefit is obtained at the expense of range and accuracy. In either case, the metal must have been manufactured with the end application in mind. The standard against which high accuracy thermometers should be measured is that of the International Temperature Scale, ITS-90. This specifies a number of reference calibration points such as the triple point of various substances, and of the freezing points of others.
What measures the average thermal energy?
The kinetic energy of a system.
A psychrometer gives the same reading on both thermometers. What is the relative humidity?
100 %
What does a psychrometer use?
It is an instrument for determining atmospheric humidity by the reading of two thermometers, one bulb being kept moist and ventilated
How does a psychrometer work?
A psychrometer has two thermometers first off, second it can work by the bulb of the wet-bulb thermometer that has a cloth covering the moistened with water. Air is than blown over both thermometers. Because the wet -bulb thermometer is cooled by evaporation, its reading drops below that of the dry- bulb thermometer and dont let stalkers stalk you .. plus LOOK UP SKRILLEX ON YOUTUBE!! AWESOME!!!
What is a hygrometers?
AnswerA hygrometer is an instrument for measuring humidity in the surrounding environment.using to bulb thermometers in it one is dry and the other one is wet.the wet one is used to know the amount of humidity due to evaporation and then it's compared with the reading of the dry one to get the difference.which is the rate of humidity.A hygrometer measures humidity in the surrounding environment.using to bulb thermometers in it one is dry and the other one is wet.the wet one is used to know the amount of humidity due to evaporation and then it's compared with the reading of the dry one to get the difference.which is the rate of humidity.
How does a hygrometer work?
Any instrument for measuring the humidity, or water vapour content, of a gas (usually air). A wet and dry bulb hygrometer consists of two vertical thermometers, with one of the bulbs covered in absorbent cloth dipped into water. As the water evaporates, the bulb cools, producing a temperature difference between the two thermometers. The amount of evaporation, and hence cooling of the wet bulb, depends on the relative humidity of the air.
How can a sling psychrometer can measure relative humidity and dew point?
A sling psychrometer an instrument that measures relative humidity (a hygrometer). The sling has two thermometers, a dry bulb and a wet bulb thermometer, mounted together on a chain. The wet bulb thermometer is wrapped in muslin that is moistened with distilled water. The user then swings the sling until the temperatures stabilize, then quickly notes the two temperatures. To interpret the readings and determine the humidity, a chart is then used for the specific altitude at which the reading was taken. Basically, the drier the air is, the more moisture evaporates from the moistened muslin-covered thermometer, and the greater the difference between the two thermometers. If the relative humidity is 100%, then the two temperatures will be the same. Slings have been around for years, and are becoming less and less used for many reasons. With the advent of digital hygrometers, it's just easier to pull out a device and read the screen. Additionally, besides being cumbersome and time consuming, slings contain mercury, a hazardous material, and must be handled with care. A sling will typically read 5-10% high due to user error. Some of the mistakes that can be made while using a sling are: 1. If the sock on the wet bulb thermometer is not clean, the humidity measured from a sling will err on the high side. 2. If the water used for the wet bulb thermometer is not distilled water, the humidity measured from a sling will err on the high side. 3. If the sling is not swung around long enough, the humidity measured from a sling will err on the high side. 4. If the thermometer measurements are not read quickly enough after swinging the sling, the humidity measured from a sling will err on the high side. 5. If the charts used to interpret the results are not for the same altitude where the readings were taken, the humidity will be incorrect. Additionally, the charts are only available in 100' increments, and it is often difficult to determine the exact altitude of the user.
Which type of thermometer gives the least accurate reading of all thermometers?
disposable thermometers
A sling psychrometer is used to determine?
A sling psychrometer (which is a hygrometer) measures the moisture content of the atmosphere surrounding it. It is called a sling psychrometer because it is whirled around in the air until a constant value/reading is obtained from the wet-bulb thermometer.
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.
Thermometers need numbers on a ----- to give a temperature reading?
Scale Degree
What can you assume about the amount of water vapor in the air if there is no difference between the wet- and dry bulb reading of a psychrometer?
It is saturated.
Which type of thermometer give the least accurate reading of all?
disposable thermometers
