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: In your laboratory notebook, draw an energy diagram for your semiconductor sample. On your energy…

A: In semiconductor we know the conduction band contain null, and valence band is fully filled, and…

Q: The maximum wavelength of light that a certain silicon photocell can detect is 1.11 μm. (a) What is…

A: The energy difference between the top valence band and bottom of conduction band in terms of…

Q: Shown below is a key diagram that helps to explain silica-based glass. Describe this diagram as…

A: The following picture represents all the details that can be derived from the above given image.

Q: What is the primary component of a bituminous pavement? A) Cement B) Lime C) Bitumen D) Gypsum

A: The correct answer is C) Bitumen. Bituminous pavement, also known as asphalt pavement, is primarily…

Q: Which of the following is a method used to strengthen existing reinforced concrete structures? a)…

A: The question is asking us to identify the method used to strengthen existing reinforced concrete…

Q: Does sodium hydroxide have higher conductivity or ammonia?

A:

Q: Suppose one made a semiconductor with a bandgap that corresponded to a 390 nm photon. What would its…

A: Bandgap energy is given by the formula,                                 We know that     Therefore,…

Q: what is liquid junction potential ?

A: When two different concentrations of electrolyte solution come in contact forms liquid junction…

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: Melting gold with other metals makes 10-karat gold. Which term best describes 10-karat gold?

A: 10 karat gold is an alloy . Alloy are the homogeneous mixture. Since alloy contain more than one…

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

A:

Q: How much dopant is present in 107 kgkg of semiconductor with a dopant concentration of 2.00 ppmppm…

A: Given: Mass of semiconductor = 107 Kg. And the concentration of dopant = 2.00 ppm by mass.

Q: What is semi-conductor?

A: Conductors are those substances which allow the flow of heat and electricity through them while…

Q: Describe what happens on the molecular level when silica is heated and then cooled to make glass.

A: The general formula of silica is SiO2 which melts on heating above 1500oC.