It is cooling by evaporation
It is swung through the air to speed up evaporation of water from the wet bulb thermometer.
One of the better ways would be to use a sling psychrometer.
a graduated cylinder looks like yo face
Like in a Hygrometer to measure humidity you use percentage (%)
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).
The Ballista - The Ballista was similar to a Giant Crossbow and worked by using tensionThe Trebuchet - The massive Trebuchet consisted of a lever and a sling and was capable of hurling stones weighing 200 pounds with a range of up to about 300 yardsThe Mangonel - Missiles were launched from a bowl-shaped bucket at the end of the one giant arm of the MangonelThe Springald - A type of BallistaThe Onager - A type of Mangonel
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.
It is swung through the air to speed up evaporation of water from the wet bulb thermometer.
when was the sing psychrometer invente
At Hardwere Stores:)
4
It measures humidity
A
Relative humidity
There are a lot of places to buy a sling psychrometer. Any company which sells scientific equipment should have them, or one could buy it from Amazon or Bacharach.
it has changed a lot
One of the better ways would be to use a sling psychrometer.
There are two types - the wet-bulb sling psychrometer and the dry-bulb psychrometer. Look up the definitions of these instruments for more details.