material lec 2 part1

its mass per unit volume

ratio of an object density to that of a standard substance.

the unit of specific gravity is

• kg/m3
• g/cm3
• cm3/k
• none of the above

the unit of density is

• kg /m3
• m/s2
• g / cm3
• A and C

It is the temperature at which the material melts

Melting point of solid = Freezing point of liquid

• true
• false

low density is required in materials used for fabrication of upper denture base

High density is indicated in casting of metallic restorations because

Dental significance of melting point

It is the quantity of heat needed to raise the temperature of a unit mass (1g) of the material 1C at constant pressure