Recent content by ana111790

Thank you, that was very helpful!

Homework Statement Based on the following chart, what ions would you use to construct an electrochemical cell with potential closest to 2.00 V? [PLAIN]http://img546.imageshack.us/img546/5568/electrochemicalcellchar.png Homework Equations I know that I am supposed to add the voltages of...

The image is pasted straight from the homework handout, I haven't copied it myself. (V1 should have read -60, don't know how/why I ended up with -50, my mistake) So for the last part, to calculate I2: Sum on loop ABFH = -I2*5Ohms - V1 = 0 I2 = 60/5 = 12 But this doesn't make sense...

That is how I started the calculations earlier - by summing the currents at node B, but the solution doesn't make sense from what you pointed out. here's another try: Sum of currents at node D = 8A-10A-I3 Solving for I3: I3= -2A (2A going INTO node D). Sum of Voltages DEFG (lower right...

I have not learned how to go about solving this problems and this is for a class without a textbook so I really have nothing to refer to. How do you suggest I approach it?

I am honestly not sure what they are supposed to be...this is a homework problem that my professor made up. I took them to be a Voltmeter since it wasn't displayed with a battery symbol. And I should mention, the blue arrows (only) are added in by me to help with the signs in the...

Homework Statement Homework Equations Kirchoff's Voltage Law - Sum of voltages = 0 Kirchoff's Current Law - Net Sum of Currents going into a node = 0 V = IR The Attempt at a Solution I am not sure if I am doing this correctly, could someone please check my work? Sum of I net at node B = - I2 -...

Homework Statement Find the integral of: [a*ln(b/(b -cx)) - kx] dx Where all a,b,c,k are constants and x is the variable. Homework Equations The Attempt at a Solution Rewrote is: a*INT(ln(b/(b-cx)) dx) - k*INT(x dx) I don't know how to solve the first part, (the second...

I got the right answer now. Thank you so much for your help!

The integration is actually part of the following fluid mechanics problem: Homework Statement Water flows steadily through the round pipe in the figure. The entrance velocity is Uo. The exit velocity approximates turbulent flow, u = umax(1 − r/R)1/7. Determine the ratio Uo/umax for this...

Homework Statement Calculate the following: [PLAIN]http://img852.imageshack.us/img852/5580/integraltocalculate.jpg Homework Equations u substitution where: u= (1-r/R); du = -1/R dr The Attempt at a Solution = umax*INT(-R*u1/7 du) = -umax*R*(7/8)u8/7 evaluated over 0,R = -(7/8)*R*umax [(1-...

Homework Statement At 37 ° C and 1.0 atm of pressure, air is 21.2% O2, 0.15 % CO2 and 78.65 % N2. Determine the mass and molar concentrations of each of the gases in the air. Homework Equations Molecular weight of O2=.032kg/L Molecular weight of N2=.028kg/L Molecular weight of CO2 =...

Homework Statement The following cylinder has a temperature inside Ti and temperature outside To. Using the general equation for heat conduction in a cylinder, write the temperature distribution equation as a function of the radius T(r). What is the temperature midway at r=a? (Take the heat...

Can anyone help with this question?

hmm. In the picture there is a lower case "a" where the H2O head meets the tube with H2O, and a lower case b where the air head meets the tube with air. Not sure if that is relevant. I calculated those values relative to an arbitrary h0 which I chose to be at the very bottom of the system, so...