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The Atwood Machine

Two masses on either side of a pulley with variables of mass and friction. Enter values for the masses of the two balls then hit go to see them fall!

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http://www.msu.edu/user/brechtjo/physics/atwood/atwood.html

Mass Spectrometer

The mass spectrometer is an instrument which can measure the masses and relative concentrations of atoms and molecules. It makes use of the basic magnetic force on a moving charged particle.

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http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/maspec.html#c1

Explorescience: Driven Harmonic Motion (2 masses)

Apply a driving force to two masses and three springs. Vary masses, spring constants and frequencies & observe different modes of resonance. Subscription site but with 30 day free trial.

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http://www.explorelearning.com/index.cfm?method=cResource.dspDetail&ResourceID=21

Atwood Machine

The site demonstrate the use of various masses to measure the force exerted on one mass by another.

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http://lectureonline.cl.msu.edu/~mmp//kap4/cd097a.htm

After collapse to the neutron star stage, stars with masses less than 1-3 solar masses should remain neutron stars. Those of masses greater than 1 to 3 collapse toward zero spatial extent - toward a ...

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http://hyperphysics.phy-astr.gsu.edu/hbase/astro/blkhol.html#c1

Air Track Simulator

This applet simulates collisions in one dimension. Users can change variables of mass, elasticity and initial speeds of masses on an air track.

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http://www.msu.edu/user/brechtjo/physics/airTrack/airTrack.html

Cygnus X-1

Doppler studies of this blue supergiant in Cygnus indicate a period of 5.6 days in orbit around an unseen companion. The mass of the companion is calculated to be 8-10 solar masses, much too large to ...

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http://hyperphysics.phy-astr.gsu.edu/hbase/astro/blkbin.html#c1

Chandrasekhar Limit

The calculation of the maximum mass of 1.44 solar masses for a white dwarf was done by Subrahmanyan Chandrasekhar on a ship on the way from India to England to begin graduate study in physics at ...

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http://hyperphysics.phy-astr.gsu.edu/hbase/astro/whdwar.html#c5

Reduced Mass

The relative motion of two objects which are acted on by a central force can be described by Newton's Second Law as if they were a single mass with a value called the "reduced mass".

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http://hyperphysics.phy-astr.gsu.edu/hbase/orbv.html#rm

Mass and Weight

The connection between mass and weight. Links with many other relevant pages such as mechanical quantities and relativistic mass

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http://hyperphysics.phy-astr.gsu.edu/hbase/mass.html

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