Question 1

Composite materials can be classified as ceramic-ceramic,ceramic-metal,or ceramic-polymer.Boron nitride/epoxy is classified as ________.

Accepted Answer

The answer of Composite materials can be classified as ceramic-ceramic,ceramic-metal,or...

Question 2

A silicon carbide ceramic has a unit cell with carbon atoms in a cubic closest packed arrangement with carbon atoms occupying one-half of the tetrahedral holes.The empirical formula of this ceramic is ________.

Accepted Answer

The answer of A silicon carbide ceramic has a unit...

Question 3

Alumina-titanium is a composite material used in hip replacements.Composite materials can be classified as ceramic-ceramic,ceramic-metal,or ceramic-polymer.Alumina-titanium is classified as ________.

Accepted Answer

The answer of Alumina-titanium is a composite material used in...

Question 4

In order for a photovoltaic cell to convert light to electricity,the band gap must be less than or equal to the energy of the light absorbed.If light of 955 nm is to be absorbed,the band gap of the photovoltaic cell must be less than or equal to ________ kJ/mol.

Accepted Answer

The answer of In order for a photovoltaic cell to...

Question 5

An AlGaAs diode laser pointer emits 532 nm light and appears ________ (blue,green,red)in color.

Accepted Answer

The answer of An AlGaAs diode laser pointer emits 532...

Question 6

Nonoxide ceramics include silicon nitride,the formula of which is ________.

Accepted Answer

The answer of Nonoxide ceramics include silicon nitride,the formula of...

Question 7

Because nanoparticles have a larger percentage of atoms on the surface of the nanoparticle than on the surface of bulk material,nanoparticles have ________ melting points and ________ chemical reactivity than the bulk material.

Accepted Answer

The answer of Because nanoparticles have a larger percentage of...

Question 8

The superconductor Tl₂Ba₂Ca₂Cu₃O₁₀ has a critical temperature T_c = 125 K.In order for each of the atoms to have a whole-number oxidation number,the oxidation numbers of Tl,Ba,Ca,Cu,and O must be ________,________,________,________,and ________,respectively.

Accepted Answer

The answer of The superconductor Tl₂Ba₂Ca₂Cu₃O₁₀ has a critical temperature...

Question 9

The wavelength of light emitted by the GaP_0.40As_0.60 LED,which has a band gap of 181 kJ/mol,is ________ nm.

Accepted Answer

The answer of The wavelength of light emitted by the...

Quiz 21: Metals and Solid-State Materials

Composite materials can be classified as ceramic-ceramic,ceramic-metal,or ceramic-polymer.Boron nitride/epoxy is classified as ________.

A silicon carbide ceramic has a unit cell with carbon atoms in a cubic closest packed arrangement with carbon atoms occupying one-half of the tetrahedral holes.The empirical formula of this ceramic is ________.

Alumina-titanium is a composite material used in hip replacements.Composite materials can be classified as ceramic-ceramic,ceramic-metal,or ceramic-polymer.Alumina-titanium is classified as ________.

In order for a photovoltaic cell to convert light to electricity,the band gap must be less than or equal to the energy of the light absorbed.If light of 955 nm is to be absorbed,the band gap of the photovoltaic cell must be less than or equal to ________ kJ/mol.

An AlGaAs diode laser pointer emits 532 nm light and appears ________ (blue,green,red)in color.

Nonoxide ceramics include silicon nitride,the formula of which is ________.

Because nanoparticles have a larger percentage of atoms on the surface of the nanoparticle than on the surface of bulk material,nanoparticles have melting points and chemical reactivity than the bulk material.

The superconductor Tl₂Ba₂Ca₂Cu₃O₁₀ has a critical temperature T_c = 125 K.In order for each of the atoms to have a whole-number oxidation number,the oxidation numbers of Tl,Ba,Ca,Cu,and O must be ,,,,and ,respectively.

The wavelength of light emitted by the GaP_0.40As_0.60 LED,which has a band gap of 181 kJ/mol,is ________ nm.

Quiz 21: Metals and Solid-State Materials

Composite materials can be classified as ceramic-ceramic,ceramic-metal,or ceramic-polymer.Boron nitride/epoxy is classified as ________.

A silicon carbide ceramic has a unit cell with carbon atoms in a cubic closest packed arrangement with carbon atoms occupying one-half of the tetrahedral holes.The empirical formula of this ceramic is ________.

Alumina-titanium is a composite material used in hip replacements.Composite materials can be classified as ceramic-ceramic,ceramic-metal,or ceramic-polymer.Alumina-titanium is classified as ________.

In order for a photovoltaic cell to convert light to electricity,the band gap must be less than or equal to the energy of the light absorbed.If light of 955 nm is to be absorbed,the band gap of the photovoltaic cell must be less than or equal to ________ kJ/mol.

An AlGaAs diode laser pointer emits 532 nm light and appears ________ (blue,green,red)in color.

Nonoxide ceramics include silicon nitride,the formula of which is ________.

Because nanoparticles have a larger percentage of atoms on the surface of the nanoparticle than on the surface of bulk material,nanoparticles have ________ melting points and ________ chemical reactivity than the bulk material.

The superconductor Tl2Ba2Ca2Cu3O10 has a critical temperature Tc = 125 K.In order for each of the atoms to have a whole-number oxidation number,the oxidation numbers of Tl,Ba,Ca,Cu,and O must be ________,________,________,________,and ________,respectively.

The wavelength of light emitted by the GaP0.40As0.60 LED,which has a band gap of 181 kJ/mol,is ________ nm.

Because nanoparticles have a larger percentage of atoms on the surface of the nanoparticle than on the surface of bulk material,nanoparticles have melting points and chemical reactivity than the bulk material.

The superconductor Tl₂Ba₂Ca₂Cu₃O₁₀ has a critical temperature T_c = 125 K.In order for each of the atoms to have a whole-number oxidation number,the oxidation numbers of Tl,Ba,Ca,Cu,and O must be ,,,,and ,respectively.

The wavelength of light emitted by the GaP_0.40As_0.60 LED,which has a band gap of 181 kJ/mol,is ________ nm.