Weather balloon
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A weather balloon, also known as a sounding balloon, is a high-altitude balloon that carries instruments into the stratosphere for measuring atmospheric pressure, temperature, humidity and wind speed
Picture taken at approximately 30 km above Oregon using a 1,500 gram weather balloon
Rawinsonde weather balloon just after launch. Notice a parachute in the center of the string and a small instrument box at the end. After release it measures many parameters. These include temperature, relative humidity, pressure, and wind speed and wind direction. This information is transmitted back to surface observers.
A hydrogen filled balloon at Cambridge Bay Upper Air station, Nunavut, Canada
Thermodynamic diagrams
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Thermodynamic diagrams are diagrams used to represent the thermodynamic states of a material and the consequences of manipulating this material. For instance, a temperature–entropy diagram may be used
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