How can one differentiate ordinary glass from toughened glass?
Unless labelled "safety glass", it's impossible to tell by looking at it whether glass is standard or "safety". However, when attempting to score and cut safety glass, the scoring tool will not easily penetrate the surface, and the score line will be shallow and intermittent. Attemting to snap the glass on the score line will result in the entire pane shattering into small cubes.
Mainly because the process of tampering increases the strength of glass (by 200% to 400%) thereby reducing it's risk of breakage. Then also, in the unlikely event of a breakage, one type of tampered glass shatters into many small fragments to reduce the risk of injury and damage to other property. Another type breaks into linear fragments that may still remain safely in frame. Tampered or toughened glass therefore addresses the need for superior stength…
The accented E (é) or acute E, has two uses. One is to indicate an accented vowel different from the one used by ordinary pronunciation rules. The other is to differentiate between homonyms (e.g. él "he/him" and el meaning "the", masculine). This usage of the acute accent is called acento diacrítico.
In an ordinary annuity, the annuity payments are fed into the investment at the END of the year. In an annuity due, the payments are made at the BEGINNING of the year. Therefore, with an annuity due, each annuity payment accumulates an extra year of interest. This means that the future value of an annuity due is always greater than the future value of an ordinary annuity. When computing present value, each payment in an…
What is the brittle cold temperature at which high impact polystyrene breaks easily please explain what easily definition you have used in your answer I am open to all insight?
A material is brittle if, when subjected to stress, it breaks without significant deformation (strain). Brittle materials absorb relatively little energy prior to fracture, even those of high strength. Breaking is often accompanied by a snapping sound. Brittle materials include most ceramics and glasses (which do not deform plastically) and some polymers, such as PMMA and polystyrene. Many steels become brittle at low temperatures (see ductile-brittle transition temperature), depending on their composition and processing. This…
Therma losses are heat losses, or losses of heat energy. Just one example is the idea of thermal loss through windows in a structure. Walls can be insulated, but heat energy can pass readily through ordinary window glass. On a cold day, there are a lot of thermal losses from a structure through regular glass windows.
Glass is primarily made from silica (SiO2), which is basically just melted sand. People add a bunch of other ingredients like lead and sodium carbonate to improve the properties, but silica is the main ingredient. add. Borosilicate glasses have boron added to the mix, and these glasses have a thermal expansion coefficient about one-third of that of ordinary glass. Hence their use for lab glassware, and in oven dishes under brand names such as Pyrex.
The weight of a mobile phone depends entirely of the make and model of the unit in question. A simple cheap-end phone might weight less than a more expensive one due to different materials in use. A cheap phone might be made from plastic, where an expensive phone (for example the iPhone) uses toughened glass and aluminum (or in some cases they might even use titanium).