Table of Contents
- 1 What is the purpose of spinning the thermometers in a sling psychrometer?
- 2 Why does swinging the wet bulb thermometer make it cooler?
- 3 Why is learning about the psychrometer important?
- 4 How is a sling thermometer used?
- 5 How does the sling psychrometer data allow us to make predictions about the weather?
- 6 How does a sling thermometer work?
What is the purpose of spinning the thermometers in a sling psychrometer?
Once the wick is wet, hold the handle and whirl the psychrometer in the air. Whirling generates airflow around both the wet and dry bulbs. This action allows water in the saturated wick to evaporate, thereby reducing the temperature of the wet-bulb thermometer. The dry bulb temperature will remain unchanged.
Why do we need to swing the sling psychrometer at a consistent pace?
When a sling psychrometer is swung round in the air, moisture will evaporate from the wet-bulb thermometer, reducing its temperature depending on the humidity of the air it is exposed to. The higher the humidity, the lower the rate of evaporation and so the higher the temperature recorded.
Why does swinging the wet bulb thermometer make it cooler?
The figure shows what will happen as you start to swing the wet bulb thermometer. Water will begin to evaporate from the wet piece of cloth. The evaporation is shown as blue arrows because this will cool the thermometer. The water on the wet thermometer starts out at 80 F and evaporates fairly rapidly.
When using a sling psychrometer what happens to the two thermometers?
These two thermometers are called dry bulb and wet bulb. When the sling psychrometer is spun rapidly in the air, the evaporation of the water from the wick causes the wet bulb thermometer to read lower than the dry bulb thermometer.
Why is learning about the psychrometer important?
Information about the relative humidity is obliging in understanding the weather. A psychrometer is an instrument that counts both the wet-bulb and dry-bulb temperatures. Knowing the relative humidity helps understand the weather and what to expect. It is also helpful if you keep several indoor plants.
What was the purpose of spinning the psychrometer What did the spinning psychrometer simulate?
A psychrometer is a device used to measure the humidity of air. It accomplishes this by comparing the difference in temperature between a dry thermometer bulb and a wet thermometer bulb that has lost some of its moisture through evaporation.
How is a sling thermometer used?
A sling psychrometer can be used to find relative humidity, which is expressed as a percentage. It is computed by multiplying the amount of moisture in the air at a given temperature, dividing by the maxi- mum amount of moisture the air could contain at that same temperature, and then multiplying the quotient by 100.
What is measurement thermometer?
A thermometer is a device used for measuring temperature. It can measure the temperature of a solid such as food, a liquid such as water, or a gas such as air. The three most common units of measurement for temperature are Celsius, Fahrenheit, and kelvin. The Celsius scale is part of the metric system.
How does the sling psychrometer data allow us to make predictions about the weather?
How does the sling psychrometer data allow us to make predictions about the weather? The sling psychrometer works by allowing the water soaked up by the cloth wick/sock covering the wet-bulb thermometer to get evaporated into the air.
When using a sling psychrometer what allows the temperatures of each thermometer to change?
When the sling psychrometer with a wet wick is rotated in the air (slinging it) at a specific RPM (120-180 RPM) for a specific amount of time (90 seconds), the air moving across the wick evaporates the water. The evaporation of the water causes a temperature drop in the wet-bulb thermometer.
How does a sling thermometer work?
A sling psychrometer works on the premise that evaporation is a cooling process. The drier the air, the more evaporation takes place off of the wet bulb, dropping the temperature on the thermometer. Wet the cotton wick of the wet bulb thermometer water at room temperature.