Virginia Tech Physics Outreach Wiki
Welcome to the Virginia Tech Physics Department Outreach Wiki. This wiki has a list of all of the demonstrations that Outreach uses with explanaintions of how to present them, the physics behind the demo and more. The Demos are separated into four categories: Mechanics, Thermodynamics, Electromagnetism, and Light and Waves. The following links will take you to each section, and each section breifly describes what subject matter is covered. The title to each section is a link that will take you to an expanded list of demonstrations.
Justin and Justin Doing Science!
Mechanics is the branch of physics that deals with the motion of material objects . These demonstrations are more concrete, and very visible. They are the most intuative demonstrations, but some of them might still surprise you. These demos require a lot of space, and some strength.
- Large and Small Ball Collision
- Wheel as a Gyroscope
- Angular Momentum Stool
- Centripetal Force on a Spinning Cup
- Feather and Coin
- Happy or Sad Balls
- Newton's Cradle
- Rolling Bodies
These demos are concerned with heat and temperature and their relation to energy and work. It defines macroscopic variables, such as internal energy, entropy, and pressure, that partly describe a body of matter or radiation. These demos explain things like why your ears pop when you travel up a mountain, a simple model of a diesel engine and more related to heat and pressure.
- Lung and Diaphragm Model
- Fire Piston
- Thermal Expansion of Air (Balloon in LN2)
- Boiling Water at Room Temperature
- Balloon or Marshmellow in a Vacuum
- Coanda Effect
- Magdeburg Hemispheres
- Small Bed of Nails
Demos in this section involve the study of the electromagnetic force, a type of physical interaction that occurs between electrically charged particles. The demos start of with simple static electricty (why you get shocked when you touch metal door), and go on to explain how magnetism and electricy are related.
- Van De Graaff Generator
- Ring Launcher
- Faraday Flashlight
- Lenz's Law Tube
- Superconductivity and the Meissner Effect
- Various Magnetic Materials
These demos show whats different when energy and matter travels in waves. Simple harmonic and wave motion help us describe how our instruments work, and how sound changes as it travels. Discussions of light, how it moves (in waves and as a particle!) and it's components are also disucussed.
- Doppler Effect
- Sound Resonance in an Open or Closed Tube
- Bloogle Tube
- Sound in a Vacuum
- Refraction and Critical Angle
- Mirror Illusion
- Ray Optics
- Index of Refraction
- Light Scattering
- Atomic Spectra