Timothy.Siu
Prophet 9
Q10a. 5ln5 -4
b) i) a proof
ii)x=L/root2
iii) MP?=S(root2-1)
b) i) a proof
ii)x=L/root2
iii) MP?=S(root2-1)
oops i think i got 5 c) iii) wrong... to get the rate of change I derived and gotm.incognito said:Question FIVE:
c) i) 6000
ii) 0.2986
iii) 298.6 lux/m
I=/=1000janaranaran! said:oops i think i got 5 c) iii) wrong... to get the rate of change I derived and got
dI/dk = -s x I
and when s = 6, I= 1000, so my rate of change was decreasing 6000 lux/m
what did i do wrong?
you had to derive the whole formula after subbing in A and k.janaranaran! said:oops i think i got 5 c) iii) wrong... to get the rate of change I derived and got
dI/dk = -s x I
and when s = 6, I= 1000, so my rate of change was decreasing 6000 lux/m
what did i do wrong?
well you're supposed to get.. dI/ds (because it asks for lux/m)janaranaran! said:oops i think i got 5 c) iii) wrong... to get the rate of change I derived and got
dI/dk = -s x I
and when s = 6, I= 1000, so my rate of change was decreasing 6000 lux/m
what did i do wrong?
Awesome. Looks like I got it right then.m.incognito said:Question 6:
thanks i left early so they didn't let us take themm.incognito said:Questions 7 - 10:
I stayed through the entire exam, and I still couldn't get my paper!Timothy.Siu said:thanks i left early so they didn't let us take them
oooh i see, I did dI/dk instead of dI/ds, what with the k being the constant and such.Wingom said:well you're supposed to get.. dI/ds (because it asks for lux/m)
and dI/ds = -kI
= -1/6ln6*1000 = -298.6 (as many ppl have said..)
So.. then i guess you put it is decreasing at 298.6 lux/m
75pi/4 u^{3}JamesTockuss said:What did people get for 6(c) ?
This isn't correct, or at least it doesn't comply with what I have written on my exam paper, did they round off too early or are those mis-labled. I have:emo-kid-91 said:quoting from elsewhere...
Question 4 b)
50 x 1.2 = 60 (first application)
60 x 1.2 = 72 (second application)
72 x 1.2 = 86.4 (third)
86.4 x 1.2 = 103.68 (fourth)
103.68 x 1.2 = 124.416 (fifth)
124.416 x 1.2 = 149.2992 (sixth)
149.2992 x 1.2 = 179.159 (seventh)
179.159 x 1.2 = 214.49 (eighth)
continuing on...
214.49 x 1.2 = 257 (ninth)
257 x 1.2 = 308.86 (tenth)
308 x 1.2 = 370 (eleventh)
370 x 1.2 = 444 (twelfth)