A model of molecular motion and pressure using practice golf balls.
The kinetic energy of gas molecules bouncing off a surface causes pressure.
Increasing the molecules' speeds increases the pressure and the volume of the gas.
Pla...
A beam of light is distorted due to turbulent convection currents in air. This is a model of atmospheric distortion that affects seeing conditions in ground based optical and infrared astronomy.
Turbulent air is provided by an...
When evacuated, held together by bombardment of atmospheric molecules.
Two brass hemispheres are brought together and evacuated, and are held together by the pressure of the atmosphere.
Two brass hemispheres fit together to form...
Sodium 'D' line absorption showing up as a black line in the yellow of a continuous spectrum. Good as a simulation of the sodium portion of the Fraunhoffer absorption spectrum caused by atoms in the solar atmosphere; it does not however...
Sodium 'D' line absorption showing up as a black line in the yellow of a continuous spectrum. Good as a simulation of the sodium portion of the Fraunhoffer absorption spectrum caused by atoms in the solar atmosphere; it does not however...
Nitrogen dioxide is produced by an electric discharge in air and, when sprayed with a water mist, produces acid rain.
Some of the most irritating and dangerous pollutants in our atmosphere are gases such as sulfur dioxide and nitrogen...
This is a concept question relating to Pascal's cask-bursting experiment. Imagine the experiment inverted—literally! Attach a 20-ft length of tubing to the opening of a can full of water. Turn the can upside down and raise it high. Will the...
A vacuum is drawn over a beaker of sliced cucumber covered in a clear dressing. The cucumber outgases, making bubbles. When the atmosphere is readmitted, the dressing is forced into the cucumber, rendering it translucent and seasoned.
A polycarbonate bell...
A siphon is a device that allows the transfer of a fluid from one reservoir to a second at a lower level even though the first part of the journey is up-hill.
A siphon is effectively an inverted U-tube with unequal length tubes...
