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This demonstration shows how two thermometers can be used to calculate the relative humidity. One thermometer has a wet cloth over it; the other is dry. The device is whirled in the air and then the temperature of each thermometer is read. As the device is spinning, the water on the cloth is evaporating. Using the difference between the temperatures and the table below, the relative humidity is calculated.
* Equipment seen in the video may vary from equipment used in ND Demonstrations. See information and images below for ND equipment and setup.
Setup:
Place the device and a beaker of water on the demo table.
Wet the cloth and wrap it around one of the thermometer bulbs.
Whirl the device around your head for a few seconds.
Measure and record the temperatures of the two bulbs. Use this table to calculate the relative humidity.
Notes:
None
Courses Used In:
Coming Soon
Discussion and Polling Questions:
Coming Soon
Equipment Needed:
Hygrometer
Beaker of Water
Relative Humidity Table
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