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#1 Re: Help Me ! » Past exam paper!!!! » 2006-10-07 08:42:31
well i looked at the question again and it doesnt say anywhere if it is a constant, so it must be a variable probably?
#2 Re: Help Me ! » Past exam paper!!!! » 2006-10-06 16:21:20
hey polylog, i just got to know this question was from error analysis......maybe that helps someone???? but anyway thanks for ur time on this question, i will try ur method.
#3 Re: Help Me ! » Past exam paper!!!! » 2006-10-04 03:34:06
Ok thanks for that, i understand until this point......but how could i now find out c???
#4 Help Me ! » Past exam paper!!!! » 2006-10-03 07:54:53
- Johnathan1
- Replies: 6
Hello everyone, just a question to ask.....
Determine which quantity or combination of quantities you would plot on the x and y axis in order to plot a straight line and thus determine the constant c in the following question. (f, r are variable and c, b are constants). we need to identify x, y and c.
a) f^2 = c / (r^3)
b) f = L^-rc
c) f = rl^-c
d) f = cr - b
e) f = c/r - b
Ok i dont need the solutions, but if u could guide how i need to do this then that should be more than enough. If i have problems i will come back to u, thanks alot!!!! 
#5 Re: Help Me ! » A problem. » 2006-06-10 21:29:48
hmmm but krassi, thats the problem. its asking for times! if i substitute with 0. it will only give me one time.
#6 Re: Help Me ! » A problem. » 2006-06-10 20:52:11
Hey, can anybody not help on this?
#7 Help Me ! » A problem. » 2006-06-10 06:17:51
- Johnathan1
- Replies: 4
Hey. Hope everyones well. First post on this forum !!!! I had this question regarding an equation, its about max/min point and re-arraning.
Heres the equation:
The current in an A.C. circuit at any time "t" seconds is given by:
i = 80sin (100*pi*t + 0.47)
1) The time when the current is a minimum
2)The times when i = 0.
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