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Code Number: 7D30.90
Demo Title: Orbits on the Overhead/Mass Spectrometer Model
Condition: Excellent
Principle: Orbits Around a Gravity Well
Area of Study: Mechanics and Astronomy
Equipment:
Overhead plate with ball bearings.
Procedure:
See also: 1L20.66 in Mechanics and 1L20.66/7D30.90 in Astronomy.
Place the Plexiglas plate with attached ring magnet on the overhead projector. Roll one of the ball bearings at a grazing angle across the ring magnet. Watch the ball bearing either be deflected to a different direction, or orbit the magnet. The ramp can be attached to several places on the plate and will be a great help in controlling ball bearing speed and direction or grazing angle.
References:
- Michel Gagnon, "A Mass Spectrometer Simulator in Your Computer", TPT, Vol. 50, #9, Dec. 2012, p. 553.
- Matthew Lowry, "Teaching Universal Gravitation with Vector Games", TPT, Vol. 46, #9, Dec. 2008, p. 519.
- Steve Dail, "Angular Momentum Demo Using Magnetic Neodymium Spheres", TPT, Vol. 44, #6, Sept. 2006, p. 391.
- John W. Dewdney, "Poor Man's Mass Spectrometer", AJP, Vol. 31, #12, Dec. 1963, p. 932.
- S - 190: "Atoms, Molecules and Solids", DICK and RAE Physics Demo Notebook.
- David Kutliroff, "A Mass Spectrograph Analog", 101 Classroom Demonstrations and Experiments for Teaching Physics, p. 219.
- Borislaw Bilash II, David Maiullo, "Model of Mass Spectrometer: A Demo A Day: A Year of Physics Demonstrations, p. 293.