# Search results

1. ### Some maths question (MC)

Hey guys, Could anyone work out a step-by-step answer to the following two questions (please and thank you :) ) Trig http://imgur.com/Oa0qWLO Probability http://imgur.com/Aa7p5ae
2. ### There is only one B-cell for one antigen?

Hey guys, Is there only one B-cell for one antien and once that B-cell is activated, it clones itself and differentiates into plasma +memory? It just seems abit hard to believe haha + I've always thought that B cells were like any other cell and quite uniform. Is that what the clonal...
3. ### English Ext 1 past papers?

Hey guys, I was just wondering if anyone has any EExt1 past papers, they're happy to share :) I've had a look and can't seem to find any trial papers other than a sydney girls one (of a past syllabus) Cheers
4. ### 23 degrees 5 minutes, short film - ending?

(spoilers alert) Hey guys, So I was wondering - has anyone seen the short film, 23 degrees 5 mins? Here's the link https://www.shortoftheweek.com/2013/03/22/23-degrees-5-minutes/ if anyone's curious. To whomever has seen this short film - do you get the ending? It doesn't make sense to me -...
5. ### Meiosis help

Hello! I was wondering if anyone could explain a detailed process of meiosis for me? I know one parent diploid cell splits up to form 4 haploid daughter cells which are all genetically unique from the parent cell, however the process which this occurs confuses me (e.g Interphase, metaphase 1...
6. ### Binomials theorem help~

I was wondering for the substitution one, cambridge mentions (x+y ) ^n = n E k=0 nCk x^(n-k) y^k where E is sigma and the letter in front of it is the one on top, and the one just behind is the one drawn on the bottom is that a general formula or only applicable to binomial theorems...
7. ### log problem - how do you switch fractions into log?

For the questions: c. Given y = 2xe^(2x) i) Find dy/dx 2 ii) Hence evaluate int 4 xe^(2x).dx 3 (give your answer in exact form) in ii), the answers go as the following: I can follow until the lines indicated by the question mark. I don't understand how the...
8. ### intergration problem

How do you solve intergration problems with something like (let f = integrand symbol) F (1-x)^4 .dx with limits of 1 and 0? Or how doul you solve integration problems which you would solve using the chain rule if it was a differentiation problem? :D thanks~
9. ### Are viruses considered a change in the chemical environment?

For the first dot point in blueprint of life "outline the impact on evolution....changes in chemical conditions in the environment" I was thinking of doing rabbits and myxomatosis, but it's a virus and not a chemical. Thank you in advance :)
10. ### Trignometry applications of trig identities calc. Qs

? http://imgur.com/bvOXkAi Can someone take me through q5 step by step? Can someone take me through q 6 c) and 7please? Thankies:))
11. ### Difference between glycerol,glycerides, phospholipid, cholesterol, chylomicrons?

Difference between glycerol,glycerides, trigylcerides, phospholipid, cholesterol, chylomicrons? ^ for forms of lipids (dot point 9.2.2.A1 "identify the form(s) in which each of the following is carried in mammalian blood... lipids" as they're transported in the blood. Apparently you don't...
12. ### Hello, just a few questions to do with haemogloblin, diffusion and digestive system

Hello~ I was looking over my notes and found some questions past me wrote, and apparently forgot about. So I was just wondering (since I don't remember anything before holidays): - does oxygen in blood diffuses across respiratory surfaces of lungs into the blood because there's a higher...
13. ### Why does higher ionising power equate to higher electrical conductivity?

^ or why do strong acids conduct electricity better than weak acids, in regards to ionisation power Thank you:)
14. ### Trig y=sinx-sin x/2 ?

How would you solve/graph for questions such as y= sinx - sinx/2? I get how to draw y = sinx and y = sinx/2 but I'm stumped with a question that combines the two. (other examples are y = 2cos x + 3sinx etc) If anyone could explain, I'll really appreciate it<3
15. ### Calculate moles of remaining in acid + base reaction

Hello~ For the following equation H2So4 + 2NaOH --> 2H2O + NaSO4 With 0.086M and 35ml of h2so4 and 1.00m and 25ml of Naoh , how would you calculate moles of h remaining? Not going to lie, it haven't got a clue in how to solve the question. At the moment I'm guessing would it be like...
16. ### What's the difference between a radical and peroxide?

^ as an initiator?:D Thanks<3
17. ### Induction question-divisibility

Question: n(n+2) is divisible by 4 if n is any even no. Ans (without the test n=2 etc/first step) http://imgur.com/ZJiR8ux I'm not understanding the last 2 lines in the answers. WHy is it that 4(p + k +2) transitions to 4p? THanks in advance C:
18. ### Graphing derivative functions - help?

Hi~ I'm getting stuck on drawing graphs of derivative functions, and was wondering if someone could be sweet enough to tell me what the graph of a derivative function would look like when its primitive has a turning point and stationary point. Also the attached image - did I draw it right...
19. ### If in a metal displacement reaction, nothing happens, can you write net ionic?

If in a metal displacement reaction the metal is less reactive than the solution (and so nothing happens), can you write a net ionic equation? Like full would be AB(aq) + C(s) ---> AB(aq) + C(s) OR is it written as : AB(aq) + C(s) ---> No reaction ? full ionic A+n(aq)B-n(aq) + C(s)--->...
20. ### Do electrodes contain mobile charge carriers?

What are mobile charge carriers...? o3o