Change masses, distance, see force
http://www.thephysicsaviary.com/Physics/Programs/Labs/UniversalGravityLab/index.html
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Helen rates this resource as Good
View Wave/particles models for different principle quantum numbers
http://www.walter-fendt.de/html5/phen/bohrmodel_en.htm
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Investigate exciting electrons by collisions – 2 atoms
http://mw.concord.org/nextgen/#interactives/physics/light-sound-physics/excited-electrons-physics
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See forces, period, change mass, string
http://www.walter-fendt.de/html5/phen/carousel_en.htm
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Use Newton’s Law to see effect of gravity on person
http://www.thephysicsaviary.com/Physics/Programs/Labs/ForceGravityOnPlanetMiniLab/index.html
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Change speed, charge, mass, measure dist. Of closest approach
http://www.thephysicsaviary.com/Physics/Programs/Labs/ClosestApproachLab/index.html
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Adjust wavelength of radiation to emit electrons
http://www.thephysicsaviary.com/Physics/Programs/Labs/PhotoelectricEffect/index.html
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Conical pendulum – vary angle, see forces
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Change masses, distance, see force
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Make isotopes of elements, view abundance, calculate average atomic mass
https://phet.colorado.edu/sims/html/isotopes-and-atomic-mass/latest/isotopes-and-atomic-mass_en.html
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