# Search results

1. ### What would happen if an electrolyte conducts both ions and electrons?

Homework Statement In an electrochemical cell what would happen if an electrolyte is conducting both ions and electrons? Homework Equations The Attempt at a Solution So I know electrolytes usually conduct ions and are electronic insulators. I know the electric current that...
2. ### Electrical Work Help!

its an hypothetical electrochemical cell.
3. ### Electrical Work Help!

Hi there. I was attempting this problem but my answer is not agreeing with my friends. He got 1.4 *10^-7 Any help will be appreciated. Homework Statement Calculate the work done on a system if its voltage drops from 15 V to 5 V. edge length= 1 cm water permittivity e=78.54e Homework...
4. ### Integration by parts

Integration by parts :( hi I have been trying this question for quite a while now and am unsure of what to do. Any help would be apprectiated. Integral x^13 cos(x^7) dx I know you have to use integration of parts. Here is what i have done so far: let U=x^3 dU =13x^12 dx dV=cos(x^7)...
5. ### Need calc help 1 last time.

ok thanks guys.
6. ### Need calc help 1 last time.

how do u get e^e^3x
7. ### Need calc help 1 last time.

hi there i am having trouble on the following question. 1. ln(x+y) = e^3x (1/x+y)(1+(dy/dx)) = (e^3x)(3) what can u substititue for y???
8. ### Is there an x such that e^x = 0?

yes i see. thank-you for your help.
9. ### Is there an x such that e^x = 0?

hi, i have a question. :uhh: e^x =0 is this possible, and for what values of x if so.?
10. ### Help graph

:frown: thanks anyways bengali :smile: , hopefully someone else will be ablle to help me out.
11. ### Need help deriving a formula

yes initial velocity can be set to zero if the object stops of an instant, or if it starts from rest.
12. ### Help graph

What are you trying to say here bengali babu? i dont understand how you say it seems kinda accurate and then you say that my graph just goes up wihtout changing direction. thank for ur help, but i dont get what ur trying to say. can you please clarify. thanks.
13. ### Help graph

here is what i get for the graph. can someone please verify it. http://img77.imageshack.us/img77/7238/graph7zp.jpg [Broken]
14. ### Help graph

help plz...graph Here is a question i am havin a bit of trouble with. http://img125.imageshack.us/img125/8824/cs2rr.jpg [Broken] This is what i figured out: f'(1) must be a local max or min since hte derivativee is 0 the second line are the vertical and horz assympotes. there is a...
15. ### Calculus help !

since the inflection point is x=0 b should be 0 if your work is correct. ur second derivative is right.

17. ### Calculus help

then would it be: 2.5cscθ + 2secθ = y 2.5(-cscθ)(cotθ)(dθ/dt) + 2(secθ)(tanθ)(dθ/dt) = y' 2.5(-cscθ)(cotθ)(dθ/dt) + 2(secθ)(tanθ)(dθ/dt) = 0 and what would u do next? i am confused.
18. ### Calculus help

so... you are trying to max x +y sinθ=2.5/y y=2.5/sinθ cosθ=2/x x=2/cosθ 2.5/sinθ + 2/cosθ = sum from this part i get confused... 2.5/cosθ - 2/sinθ = ds/dt 2.5/cosθ - 2/sinθ = 0 2.5/cosθ = 2/sinθ the answer is 6.35.
19. ### Sliding ladder leaning against wall, and a triangle of maximum area

thanks...but is the first question right?
20. ### Sliding ladder leaning against wall, and a triangle of maximum area

Hello, Below are two questions i am unsure of. :uhh: Can someone please verify my answers and tell me if i am doing something wrong. :yuck: thank-you for your help. :smile: 1. A rigid beam 30 m long is leaning against a vertical wall. If the bottom of the beam is pulled horizontally...
21. ### Calculus help

calculus help :( John has to carry a long piece of wood horizontally around the corner from a hallway of width 2 m to a hallway of width 2.5 m. Assuming that the piece of wood has no width, what is the maximum length of this piece of wood (in meters)? Give answer to two decimal places. i do...
22. ### Calculus no clue

So you end up with two triangles...do you use similar triangles ? 5/(4-x) = 3/x you get the answer x=3/2 if this is right how are the two triangles similar ?
23. ### Calculus no clue

calculus...no clue :( Here is this question, I have no clue how to do it, I have tried it several different ways but cannot manage to get the right answer. Any help will be appreciated. There is a 4 km long straight beach. At one end, there is a boat anchored at A, 3 km off the beach. At...

25. ### What number of passengers will maximize revenue?

New Horizons Travel adversities a package plan for a vacation. The fare for the flight is $400/person plus$8.00/person for each unsold seat on the plane. THe plane holds 120 passengers and the flight will be cancelled if there are fewer than 50 passengers. What number of passengers will...