insane_alien

was i saying that macs or PC's were crap? no i was saing that a mac book is still a laptop. don't be puting words in my mouth. i'm neutral on the whole mac v PC thing. they can both run linux so i'd be happy either way.

its still a laptop regardless of who sells it and what packaging it comes in.

there is no origin point, it happened everywhere at once.

i understand them fine. but that is hardly a comprehensive list is it. and rigidity is not always a desirable property in construction. sometimes flexing is best and then there is the whole strength/volume thing.

and the point of this is... ? and wrt the title, sometimes people do walk infront of buses. i seen it today in glasgow.

the composites still suck under dynamic loads. take a sheet of ply and a sheet of steel of equivalent strength and flex them an equal amount repeatedly. see which fails first. do the same with plastics. both the steel and the plastics wil outperform the ply and in some cases the plastic will outperform the steel.

to take down a post you can ask a moderator like YT very very nicely. also, leaving the solution next to a sunny window for a few days.

yeah we got there a while ago.

pretty much. its 1/65.4 to be more exact.

15 mmol. mmol is millimol a thousandth of a normal mol. i don't like working with 0.000XXX numbers so i use the prefixes. it's still SI though i more commonly work with kmols(thosand mols)

i concur. i get 2.75ml as well.

is your finger now a bone? if not then it was fine. i've been splashed with pH 0.5 solution. no damage done. WARNING: this does not mean go washing you face with concentrated acids, i was next to a tap.

okay, you have 15(ish)mmol of zinc so you'll need 30(ish)mmol of HCl 30mmol of HCl is 1.1g so you'll need 3.7g of the 30% solution (assuming it is weight for weight) to disolve it. this would equate to about 3.7ml call it 4ml to make sure you disolve it all.

but HCl can do things that H2SO4 cannot. its a matter of usage rather than 'lolz my acid is stronger than your acid i b so 1337 and k3wl!one1!' also hydrochloric acid has a lower pKa than sulphuric acid so technically, HCl is stronger.

yeah 1mol of zinc will react with 2 mols of hydrochloric acid.

why don't you go ahead and find out. actually, to save the market value of your house, yes there will be HCl vapours but they will only make up a small percentage of the collected vapour.

wood is only suited to it's particular niche in engineering materials. it will decay over time and eventually fail. is main use in construction is in low housing(three story max) and in temporary structures. and even in some of these cases it is unsuitable. wood is used because it is cheap. it is far from the best. plastics made from biological materials would provide many more advantages than just using trees. this is because plastics are more versatile, they can be stronger, less flammable, more flexible, more conductive(use the structure of the house to distribute mains power?) less prone to decay over time and recyclable. plastics can also be used for other strucures, such as chemical plants, skyscraper cladding/reinforcement car manufacture, and so on. they also lock up CO2 before you try that attack.

you do realise that hydrochloric acid is HCl (a small L) and not HCI(capital i) HCI(capital i) wouldn't exist(at least not for very long) and wouldbe called, umm, hydrogen carbon iodide?

6MW is quite easy to produce but the source will generally only last a few microseconds. if that.

stability. same reasons buildings fall into piles of rubble instead of piles of rubble rising to make buildings.

oi i use gedit. damn you and your sarcy lol

*wonders if fred56 thinks i have a right to copy his credit card details*

especially since YT hadn't posted till after you said that.

you really need to stop linking to other sites. its considered bad etiquette.

yeah, just stick to the rechargables. Li+ batts are good.