Dew Point and Humidity Concept

Demonstrations in Dew Point and Humidity

Sling psychrometer with two parallel glass thermometers mounted on a wooden board, with a wire sling handle at one end and a cylindrical brass counterweight at the other. A beaker of water sits nearby.
Safety

Wet and Dry Bulb Hygrometer

A sling psychrometer measures relative humidity by comparing wet and dry bulb temperatures. The wet bulb depression depends on evaporation rate, which depends on ambient humidity -- connecting evaporative cooling …
Large clear container of water, crushed soda can, intact soda can on a tripod, propane torch, and heat-resistant gloves
Safety

Condensation in an Aluminum Can

Demonstrates the enormous magnitude of atmospheric pressure. Rapid condensation of steam creates a near-vacuum inside an aluminum can, and the resulting pressure differential crushes it with a loud bang. Also …