Polycarbonate is sometimes used for protective helmets, such as motorcycle helmets. However, it is often not advisable to apply adhesive stickers to the helmet surface or to clean the surface with a solvent, as both can potentially degrade the helmet strength. Why might this be?

Q: Advantages and disadvantages relationship of conductance and conductivity.

A: Conductance It is defined as the reciprocal of resistance of a conductor or the ability of any…

Q: Use the figure of band structures to explain why the conductivity of pure metals decreases when…

A:

Q: What type of bonding would you expect in Silicon nitride? explain the answer and what kind of…

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Q: In a semiconductor, the bonding molecular orbitals that contain electrons are referred to as the…

A:

Q: How to calculate octahedral voids ?

A: Given question is : How to calculate octahedral voids = ?

Q: Identify the valence band, conduction band, and band gap,for semiconductors and insulator?

A: Valence band Conduction band Semiconductor and insulator

Q: for what purpose electrometallurgy is used for?

A: Electrometallurgy involves electrolysis of elements.  Reactive metals such as aluminium and metals…

Q: explain why graphite is a good solid lubricant

A: Why graphite is a good solid lubricant ?

Q: a. What is the equivalent energy (in Joules) of the power required by Porous at the given time? b.…

A: a. We have 1021ZW= 1W ,so 6917.82 ZW = 6.917× 10-18W. Also we have Power ,P= Energy(E)/time (t), So…

Q: How does crystallinity affect the mechanical properties of materials. with proper reference

A: Introduction: We have to explain how crystallinity affect the mechanical properties of material.

Q: Write amorphous carbon

A: Amorphous carbon is basically is reactive carbon which not  having crystalline structure.

Q: What are the main factors that determine the electrical resistance of a formation?

A: Solution:  The main factors which determine the electrical resistance of formation are mentioned…

Q: Why are covalently bonded materials generally less dense than those that are bonded ionically or…

A: Since the case when the bonds are directional, that is they are present in a particular direction…

Q: why does Magnesium oxide have high thermal conductivity but low electrical conductivity?

A:

Q: What happens to the blade as it was placed on water, kerosene, and ethanol? Differentiate them. Why…

A: Surface tension is caused by the effects of intermolecular forces at the interface. Surface tension…

Q: Metals, semiconductors, and insulators are distinguished by differences in values, A) conductivity B…

A: Metals are very good conductors of electricity. Insulators are poor conductors of electricity.…

Q: Unlike metals, semiconductors increase their conductivityas you heat them (up to a point). Suggest…

A: The material that have electrical conductivity in between conductor and insulator is known as…

Q: Discuss the preparation, properties and uses of (a) Celluloid

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Q: A semiconductor has wide energy gap and requires less energy to move an electron from the valence…

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Q: se molecular orbital band diagrams to explain why metals are good conductors but semiconductors are…

A: Introduction: We have to explain metals are good conductors but semiconductors are not. Molecular…

Q: Define composite materials

A: composite materials:-

Q: Describe the compounding process?

A: The compounding process has to be described below.

Q: Why composite biomaterials are preferred over ceramics, explain with examples.

A: Being able to use artificial intelligence to identify and automatically respond to data breaches is…

Q: for what purpose polyphosphates are used ?

A: The esters or salts of polymeric oxyanions in which phosphate groups are attached tetrahedrally and…

Q: Crystalline: Diamond ; ____????____ : Graphite

A: Given: Crystalline: Diamond ; ____????____ : Graphite

Q: why Intrinsic Semiconductor materials are the bad conductors of electricity

A: Semiconductor is actually a type of material which has  conductivity in between the conductor and…

Q: Why are impurities added to silicon dioxide in the glass making process? To increase mechanical…

A: Impurities like boric oxide , sodium oxide and aluminium are used while making the glass

Q: Why copper is used to make hot water tanks and not steel?

A: This is because steel contains iron which reacts with steam and form iron oxide.

Q: Why is graphite a good lubricant? What advantages  does it have over grease or oiled based…

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Q: explain why graphite can be used as a lubricant

A: Lubricants are the substances or compounds which are used to reduce friction between two movable…

Q: ) Explain the band structure of an electrical conductor (metal), a semiconductor, and an insulator…

A: Hello. Since your question has multiple parts, we will solve the first question for you. If you want…

Q: The measured fracture strengths for most brittle materials are significantly lower than those…

A: Brittle substances are those substances that are liable to fracture when stress is applied to them.

Q: what is The

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Q: (a) Why electrical conductivity of the semiconductor increases with increase in temperature?…

A: A) The electrical conductivity of semiconductors increases with rise in temperature as with rise in…

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A: A doped semiconductor is the one in which certain impurities are added to increase the conducting…

Q: bonding orbital nonbonding orbital phase degenerate antibonding orbital

A: In molecular orbital theory , we talk about bonding and antibonding molecular orbitals. We talk…

Q: Explain how doping can increase the conductivity of a semiconductor.

A: Conductivity is due to the mobility of electrons; therefore, conductivity can be increased by…

Q: Why polycrystalline form of a material is stable than single crystalline form?

A: All matter can be classified as solid, liquid, and gases mainly. In these physical states of matter,…

Q: Why are resistors important in an electrical circuit? ) Resistors only allow a current to flow in…

A: The flow of electron leads to the formations of current .If any thing which tends to decrease the…

Q: How do the appearances of metals, semiconductors and insulators differ? Why?

A: A question based on conductivity property, which is to be accomplished.

Q: Why materials with a high melting point have a high modulus of elasticity and low thermal expansion?

A: Melting point is defined as the temperature at which the solid and liquid forms of a pure substance…