hi again, had another snag. just need to know what http://upload.wikimedia.org/math/d/e/a/deaad034b920ebb32655dd9c00a80a7b.png
means before i can substitute it into the rows like in this example
http://upload.wikimedia.org/math/d/e/a/deaad034b920ebb32655dd9c00a80a7b.png
just a quick on now, if i have
mesh 1:
V=R1*(I1-I2)+R4*(I1-I3)
mesh 2:
0=R5*(I2-I3)+R1*(I2-I1)+R5*I2
mesh 3:
0=R3*I3+R4*(I3-I1)+R5(I3-I2)
rearranged so they can be solved using a matrix will they look like this?
mesh 1:
I1*(R1+R4)-I2*(R1)-I3*(R4)=V
mesh 2:
-I1*(R1)+I2*(R1+R2+R5)-I3*(R5)=0
mesh...
this question is part of my electronics CW, I've done it before, but briefly. and looking back at all my old notes I've realized that every single one I've done before has 2 sources and only 2 loops, whereas you can see from the image below that this has 3 and its getting me in quite a...
right cheers for that then. i know how to do it providing that is is delta 40, i also know how to do it given 2 temperatures so cheers for the help. was annoying me greatly
much appreciated, ash
i was talking to my dad about it earlier today too. but that's the exact question, haven't re worded it at all. a furnace implies very hot temperatures, and the 40k must have to be a difference. but i wanted to see if i was overlooking something so posted on here.
is there anyway to get any...
Homework Statement
a furnace wall has an area of 3m^2. a thickness of 250mm and a thermal conductivity of 1.5 W m^-1 K^-1. calculate the rate of heat transfer through it when the temperature is 40K
Homework Equations
Q/t=KxAx(T2-T1)/L
The Attempt at a Solution
This isn't homework as such...
Homework Statement
A bullet of mass 0.04kg is fired horizontally into a wooden block of mass 0.09kg. the wooden block is suspended from the ceiling by a long string. after an impact the bullet is embedded in the block and bullet and the block swing together until the block is 0.10m above its...