Recent content by fffff

the problem here is that all the letters are not different. there are two e's and 5s's how do you approach the question when the letters are repeated.

Homework Statement The letters of the word POSSESSES are written on 9 cards, one on each card. The cards are shuffled and four of them are selected and arranged in a straight line. Homework Equations (a) how many possible selections are there of 4 letters? (b"how many arrangements are...

Consider the forces when a particle is thrown upwards. And the forces then it is going downeards. Straightforward answer!

there are three loops and 2 nodes. See when considering one loop, do I have to add all the resistance together. So for loop 1 (1v) the resistance is 2.5 so current = 1/2.5=0.4 A but I am getting the wrong answer

Homework Statement http://img87.imageshack.us/img87/5418/kirchoff2nr2.jpg Now, I dnt have a clue on homework to solve this.

oh sorry for the small loop i3 is negative

Then for the first loop 2= 3 I1 + 3 i3

or do you consider them separately. say 1 V = 4 I2 + 3 I3

I didnt add I4 to it 1=4 I2 + 3(I2-I3) (12-13) would be the net current flowing into the 3 ohm resistor in the small loop

Yes, I2=I4 Thats was what I meant But are my equations correct let me edit my 2nd equation 1=4I2 +3(12-I3)

I1=I2+I3 but dosend I4 go through the same direction as I1

ok for the first loop 2=3(I1) + 3(I3) second 1=4(14) + 3(14)

the problem I am having iswith the I3 part of the second loop does current even flow there? or does i4 behave like i2 ?

http://img515.imageshack.us/img515/9714/kirchoffhf5.jpg ok for the first lloop 2=3(I[SIZE="2"]1) + 4(I[SIZE="2"]2) +3(I[SIZE="2"]3) the second loop 1=4(I[SIZE="2"]4) +3(1[SIZE="2"]4) but its still wrong

Homework Statement http://img353.imageshack.us/img353/4445/kirchoffkq4.jpg Homework Equations The Attempt at a Solution for the first loop (2v battery) the effective resistance is 33/7 the voltage is 2v so current=v/i =14/33 A Now loop 2 is the problem. i don't know...