Physical Properties - College of Dentistry
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Uploaded by SportyVirginiaBeach870
College of Dentistry
Dr. Dawlat Mostafa Ahmed
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Summary
These lecture notes cover various physical properties of materials, including mass properties, thermal properties, adhesion, and optical properties. The notes are specifically related to dental materials and include diagrams and formulas.
Full Transcript
College of Dentistry كليـــة طــب األســنان Physical Properties 1.Mass Properties 2.Thermal Properties 3.Adhesion 4.Optical Properties Weight (w) Mass (m) The force with which a The ratio of the body weight body is attracted to (w) to the gravitationa...
College of Dentistry كليـــة طــب األســنان Physical Properties 1.Mass Properties 2.Thermal Properties 3.Adhesion 4.Optical Properties Weight (w) Mass (m) The force with which a The ratio of the body weight body is attracted to (w) to the gravitational earth. acceleration (g). Force unit …… m= w/g [dyne or newton] On Earth's surface, a mass of 1 kg exerts a force of approximately 9.81 N [down]. On Earth's surface… [g = 9.81 N/kg] Density Density = Mass per unit volume Units = gm/cm3 Density Density Thermal Thermal Thermal Expansion Conductivity Diffusivity The change in length per unit length of the material for 1 °C change in temperature The coefficient of thermal expansion = ΔL / L A=B C >A=B
