Recent content by airie

Haha, I just got the letter. All the colours confuse me @.@ ...I still don't get why they sent us all those pieces of paper. I mean, the info could've been summarised in one sheet...

OK, the process is, normally you see objects cos light is reflected off them. But in the case of black holes, light is shone on them alright, but it doesn't get reflected to you cos its speed is still too slow to overcome black hole's gravity ie. c is less than the escape velocity. And on the...

Light is not exactly "pulled into a black hole" in this case. Black holes appear black since their gravity is so strong that even light speed cannot overcome the escape velocity. So light still travels at c, it's just that it doesn't ever reach you since even c is insufficient to overcome the...

Why, this thread is going crazy @.@ Someone fix the time? OK, I lied. This is not three months since my last post. :p But being in the process of making a new skin for my music player, all that coding just drives me crazy. Need some escape :p

Haha, I even froze my game accounts on purpose to stop me from going back to them XD ...But then there were other distractions. *cough* :p

Logging in for the first time in three months. I'm done! Now I'm free to do whatever I want :D:D:D (books+music+TV series+games+sleep...here I come!) ...Shall not log in for another three months or so. :D

Yes, I know that any acid would do, the catalyst is just to provide the H+ here. But my question is, what's the effect of the conc of the catalyst? And if you say that (well, I assume that you didn't mean a double negative there...) the effect of the conc of the catalyst on the rate of reaction...

I find myself the COMPLETE opposite to most people x.x See, I found section 1 to be the best, and section 3 the worst. Or maybe I'm just weird. Or bad with those "middle picture" things. Honestly, I did not get the two black and grey squiggly lines question...how the heck was I supposed to...

Thanks alcalder :) #3... Why doesn't the same thing happen with gases then? What makes some dissolutions endothermic but others exothermic? Basically, what exactly makes gases tend to escape into the air, instead of bonding with water molecules, when given more energy (as a result of more...

Half its mass? What does Tc-99m actually decay into? EDIT: I take it that you meant #6, btw :p And just to add for #3, yeah some dissolutions are endothermic, like NaCl, NH4Cl, and some other ammonium compound I think... But for the exothermic ones, like NaOH and H2SO{sub]4[/sub] and stuff...

1. Concentrated H2SO4 is used as a catalyst in dehydration of ethanol to form ethene and water, we all know that. And that dilute H2SO4 can be used in hydration of ethene. But my teacher found some source saying that conc H2SO4 can used as a catalyst in hydration of ethene as well. Question is...

lol, just try it. Just don't slack off. Like, trying to cram four sections in the last week, for example. It's not like you've got anything to lose by picking it up :D

I see your point, but it's hard to say. There's this girl at my school doing really well in her subjects (like, first in, uhh...four? subjects last year...), and she wants to do med next year, even though she's not doing any sciences in year 12. Who can judge that, oh, if she did do some...

I don't feel like talking. My throat hurts like...hell. Heck, swallowing *anything* hurts. And my nose is blocked. Who would've thought a night with the windows wide open would see this...

Guess what, I've seen a girl getting 99.95 with those subjects ^^ Anyway, I never got my head around the whole policy about ESL. I mean, I even hear that there are people in ESL who came here in year 4 or something...