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haha thanks guys!!!! that makes sense now :)

Okay I understand that (thanks guys!) but then why is it beneficial for space travel if they experience 'lengthened' time? I don't understand how they would 'age less' and all that jazz written in the textbooks.

ok, so if one second is longer, then shouldn't time be increased for astronauts? I don't understand soooo basically I understand length contraction -> because length contracts for astronauts in relative motion to the stat frame, so then going by this principle, except knowing that time dilates...

If observers in an inertial reference frame in relative motion to rest frame observe time to be longer, then why is it that this time is reduced considerably for astronauts? isn't this contradictory... i don't understand

I love helping people, the science behind it, I love being challenged constantly. I know I'll be lost in the crowd of people who will just blindly write this, so I'd really love your help reviewing so that my genuine passion shines through. I KNOW my heart is set on medicine. (btw I was one...

completely flunked section 3. it threw me off sooooooooo much that even though section 1 was doable, my brain was too flustered to even think -____- ugh WHYYYYY so i flunked 1 and 3 fosho T_T man i guess acer's really trying to make section 3 uncoacheable now SO YEAH, acer practise papers got...

Whoops my bad!!! hahahaha you're right- they aren't, and they are most certainly incorrect. but my question still stands. basically if NaOH + HCl -> NaCl + H2O What are the acid/conjugate base pairs and vice versa? because in the textbooks, they give examples like HCl + h20 -> Cl- + H3O+...

So basically I'm really confused about the definitions of conjugates cus of that. I understand that if OH- + H3O+ -> H20 + OH- the base/conjugate acid pair is OH-/H2O the acid/conjugate base pair is H3O+ and OH- BUUUUUUUT with NaOH how does NaOH + H3O+ -> H2O + Na+ + OH- how is Na+...

Re: HSC 2015 4U Marathon this has been answered already, but i have a quick question why can't you just find the perp distances of (0,0) and (0,2) to the locus determined using the given info, and then add them together?? thanks :D

thanks guys :D I have another question from terry lee which is confusing me :'( The complex numbers a=3+i , b=-5i , c=2+2i are represented by points A,B and C respectively. Find distances AB, AC and angle BAC , and hence, the area of triangle ABC. OK, so I'm find with finding the lengths of AB...

also on a totally unrelated note , how would you find the horizontal asymptotes of y=(e^x-e^-x)/(e^x+e^-x) ? THANK YOU SO MUCH :)

oh yes , that was a typing error. but does that mean you can work out the answer like that instead of using the tan(theta/2) thingo, which seems to yield a very different looking sketch when drawn? thanks!!

- sketch the locus of z if |z|<=1 and |(1-z)/(1+z)|<=sqrt3 now i understand the answers in saying -sqrt3<=tan(theta/2)<=sqrt3 and then sketching the angles from that But I just don't understand why you can't split the modulus and bring it to the other side so you get |(1-z)|<=sqrt3|1+z| which...

O i c.. thanks!! o so you just have to remember it.. well that's a bummer, i'd really love to know how you'd prove it tho

OHHH that makes sense. THANKS, but how do you know it equals pi on 2. could you elaborate please :'( thanks sooo much!!

sorrryyy but what does the arc stand for D:

THE TITLE SAYS IT ALLLL. how do i find it?? PLEASE HELP. THANKS :)

HELP GUYS so if I want the shortest distance |w-z| where w is represented by the locus x^2 + (y-1)^2 =9 and z by the line 4x+3y-24=0 , how would I find the shortest distance?? the answer says it's 4.2, but they took the perp distance from the centre of the circle. I don't get how they can do...

and so isn't thermal conductivity a better measure of how much heat a container absorbs. isn't specific heat capacity just related to temperature- and maybe it has a low specific heat capacity. okay. that just means the temperature rises more quickly and with these experiments we are more...

OKAY SO IN ORDER TO OVERCOME heat loss to surroundings we ensure that the container has a high specific heat capacity because that means it won't absorb much heat. WHY???? . . . . . . . how does this impact how much heat it absorbs? doesn't it only impact temperature rise?