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Density

Density is defined as mass per unit volume.

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

Density lab, multimedia activities

An applet where you measure the volume and mass of objects and then check if they float. You can alter the liquid's density too. Subscription required but with 30 day free trial.

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http://www.explorelearning.com/index.cfm?method=cResource.dspDetail&ResourceID=17

Balloon Race: Floating and Sinking

A nice little demonstration of the concept behind hot air balloons and densities.

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http://www.pbs.org/wgbh/nova/balloon/science/density/

Poisson v4.0

Poisson calculates electrostatic potentials by numerically solving Poisson's equation in the presence of spherical and rectangular conductors, charge densities and dielectrics.

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http://webphysics.davidson.edu/applets/poisson4/outline_poisson4.html

This site allows you to convert between a wide variety of Density units. Enter the value to convert from in the 'From' box and select its units from the list. Then select the units to convert to from ...

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http://www.tcaep.co.uk/science/conversions/surface.htm

Conversions - Linear Density

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http://www.tcaep.co.uk/science/conversions/linear.htm

$Interference or Refraction?$

Interference or Refraction?

The mathematics of refraction in materials with non-uniform optical densities leading to path differences and interference.

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$Visit Interference or Refraction?$

http://mathpages.com/home/kmath187/kmath187.htm

Conversions - Mass Density

This site allows you to convert between a wide variety of Mass and Density units. Enter the value to convert from in the 'From' box and select its units from the list. Then select the units to ...

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http://www.tcaep.co.uk/science/conversions/density.htm