got an assignment that has to be submitted by midnight tonight, have it all done, but one question, and i cant for the life of me do it. i must have spent around 4 hours today and 2 or 3 yesterday trying to do it.
basically its a simoultanious equation.
"given: Va=Ra Ia + K1 N and Te=T0 + K2 Ia
Estimate coefficients for Ra, K1, T0 and K2."
started with the first given equation, got:
@10% 25 = 1.8 Ra + 950 k1
@20% 25 = 3.2 Ra + 900 k1
now i know its a simoultanious equation, and i know that i have to do the same with the 2nd given equation to get T0 and K2. however i havent done a simoultanious equation for years.
so far this is what ive got.
Divide equation 2 by Ia at 20%
25 /3.2 = Ra (900/3.2) k1
7.8125 = Ra + 281.25 K1
7.8125 - 281.25 K1 = Ra
and at that point i get stuck, anybody able to give me any pointers on were i go from here. had a look on google ect. but that just confused me more.
and before anyone says, we havent covered this is lectures, we have coverd the formulas but not simoultanious equations. we have no notes on this ect ect ect. my notes was the first thing i looked at, then i had a google, then asked my parents, then asked a few lads who i go to uni with and there all stuck on it too. this is litterally a last port of call. no im not wanting someone to work it out for me im happy with doing that, just pointers in the right direction cause at the moment ive done 6 hours of reading about them and scribbling things down but just cant get my head around it and seem to be going around in circles.
cheers
