Materials Science 问题

most rapidly growing type of restorative material

what has no molecular weight, no 3D structure, and is bonded by ionic or metallic bonds

if the atomic number is low than the metal will be light and less dense

collections of metallic elements and nonmetallic elements held together by ionic bonds in crystalline arrays

when different elements bond together in the same metallic array

what has a molecular weight, defined 3D structure and is bonded by covalent bonding

when at least two of the 3 classes of materials occur together in a material

what gives ceramics their strength, brittleness, rigidness, and relatively high melting temp

if the atomic number is high then the metal will be dense and heavy

the building blocks of dental materials

Substances that can be made to conduct electricity under certain conditions are called ____.

Negative temperature coefficient (NTC) thermistors decrease their resistance as their temperature ____.

A ____ is a connected series of thermocouple leads used to produce a higher voltage signal.

Semiconductor device that gives off light when electrical energy is added.

A connected series of thermocouple leads used to produce a higher voltage signal.

Device that can change dc voltage to ac voltage without mechanically moving parts.

A layered, three-terminal semiconductor device used to switch or amplify an electrical signal.

Semiconductor devices used in electronic circuits can also be called ____ devices.

Device that increases its conductivity when exposed to electromagnetic radiation.

A diode setup is ____ biased if the positive terminal of a battery is connected to the cathode and the negative terminal is connected to the anode.