Question:
which thermal expansion coefficient is higher?ceramic or elastomer?and why is that?
which thermal expansion coefficient is higher?ceramic or elastomer?and why is that?
Answer:
So it really depends on the type of both you're referring to, but in general terms you're dealing with: Ceramic (a crystal-like structure of metals and ions that create a very stuff structure)Vs Elastomer (Rubber.) Because most ceramics have a very strict and rigid atomic structure (hence the reason they are brittle, but very very strong), they will generally not have much 'give' when being heatedRubbers on the other hand, are just randomly arranged carbon and hydrogen chains, and will probably expand more freely when heatedOfcourse this will still depend on your materialThe ceramic brake pads on Porsches probably won't expand as fast as the ceramic that people make bowls out ofAnd in that same vein, the rubber O-ring used on the space shuttle Challenger was too small to seal properly, probably due to cold temperatures and shrinkage.
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What size screen? If it is 13, not bad at all.
Considering the 13 2.4 Ghz model was $1300 brand new, your asking price is high, unless you are including extras.
WellI can get a BRAND NEW Macbook 2.26GHz for $999so no, it's not a good dealLower that price to something likesay$600-800 and that would be more acceptable for a 1 year old used laptop.
The Macbook professional 13'' is tremendously lots the comparablei think of you will get refurbished Macbook Unibodies from the refurbished sector on Apple's websiteyet, heavilyare not getting a Macthey're overprices, overhyped machines that have final twelve months's technologiesyou will get a much extra suitable pc for 0.5 the feeactuallyin basic terms as long as you have a solid Antivirus (AVG loose version is solid sufficient), pc's will continually be extra suitable than Macs.
So it really depends on the type of both you're referring to, but in general terms you're dealing with: Ceramic (a crystal-like structure of metals and ions that create a very stuff structure)Vs Elastomer (Rubber.) Because most ceramics have a very strict and rigid atomic structure (hence the reason they are brittle, but very very strong), they will generally not have much 'give' when being heatedRubbers on the other hand, are just randomly arranged carbon and hydrogen chains, and will probably expand more freely when heatedOfcourse this will still depend on your materialThe ceramic brake pads on Porsches probably won't expand as fast as the ceramic that people make bowls out ofAnd in that same vein, the rubber O-ring used on the space shuttle Challenger was too small to seal properly, probably due to cold temperatures and shrinkage.
