what's new in materialworlds 1.5 
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3D perspective arrows
Materialworlds 1.5 enhances many existing simulations by displaying force and velocity vectors in 3D perspective views.

screenshot image - not simulation

Kinetic gas model
This new simulation explores kinetic gas theory, plotting curves of pressure, volume and temperature as you manipulate the gas in its container - under isothermal or adiabatic conditions.

screenshot image - not simulation