One important application of DMA is measurement of the of polymers. Amorphous polymers have different glass transition temperatures, above which the material will have properties instead of glassy behavior and the stiffness of the material will drop dramatically along with a reduction in its viscosity. At the glass transition, the storage modulus decreases dramatically and the loss modul. .
Dynamic modulus (sometimes complex modulus ) is the ratio of stress to strain under vibratory conditions (calculated from data obtained from either free or forced vibration tests, in shear, compression, or elongation). It is a property of materials. [pdf]
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Solar cars are that use (PV) cells to convert sunlight into electrical power to charge the car's battery and to power the car's electric motors. Solar cars have been designed for and for public use. Solar vehicles must be light and efficient to get the best range from their limited captured power. 1,400 kg (3,000 lb) pound or even 1,000 kg (2,000 lb) vehicles would be less practica. [pdf]
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