# Search results

1. ### Evaluating Operators

Thanks you all so much for your feedback. I am very grateful:). GOD bless....
2. ### Evaluating Operators

Homework Statement Given the operator A = d/dx and B = x and the function f(x) = xe^(-ax) evaluate : ABF(x) and BAF(x) Do these operators commute (yes/No) Homework Equations [A,B]F(x) = ABF - BAF = 0 ; means they commute The Attempt at a Solution [A,B]F(x) = ABF - BAF = 0...
3. ### Find the value of A^2

Hey Ray, please look at the updated attachment below. I have tried to edit the old one but dont see any button that would allow me do so. Thanks so much for your help in advance! :)
4. ### Find the value of A^2

Thank you so much hallsoflvy for your reply. I am very grateful! I have attached a new picture to this email. I am looking for the value of A when the function is equal to zero. The final answer is sqrt (2/L). I want to understand the steps and how they got the final answer. Thanks so much in...
5. ### Find the value of A^2

please check the attachment below. The question and the attempted solution is found there. Thanks a lot for your help in advance.
6. ### Isoelectronic Point

Homework Statement Why must the PI be an average of two PKa's Homework Equations pI = (Pka1 + pKa2)/2 The Attempt at a Solution the pI is the point when the net charge of a compound is zero. I dont really know why it must be the average of two pKa's. Please I need help!
7. ### Contiuation Kirchhsoffs Circuit Problem

Thanks a lot Sunil. I am very grateful!!!
8. ### Contiuation Kirchhsoffs Circuit Problem

1) Please take a look at the attachment below in order to solve the problem. Using the figure at the right determine the values of i1, i2 and i3. Input your answers in the form "a.bc x 10^(y) A". 2) Using the correct results from #1, determine the following. For A and B you must also tell...
9. ### Kirchhsoff's Circuit Law (Loop Rule Equation)

using substitution to solve i2 and i1, I get i3 = -6/170 A ≈ -0.005381 A i1 = ( -0.005381(15Ω+20Ω) + 3)/10 = 0.2811665 i2 = (4.5 - (-0.005381 (15Ω+20Ω))/(5Ω+12Ω)) = 0.2757844 using the information above, Please how do I calculate the current in the 10.0 resistor and How do i know the...
10. ### Kirchhsoff's Circuit Law (Loop Rule Equation)

using substitution to solve i2 and i1, I get i3 = -6/170 A ≈ -0.005381 A i1 = ( -0.005381(15Ω+20Ω) + 3)/10 = 0.2811665 i2 = (4.5 - (-0.005381 (15Ω+20Ω))/(5Ω+12Ω)) = 0.2757844 using the information above, Please how do I calculate the current in the 10.0 resistor and How do i know the...
11. ### Kirchhsoff's Circuit Law (Loop Rule Equation)

Thanks a lot for your reply. I used the two loop equations to solve for i3, i2, and i1. Please Take a look at my work below.... i1(10Ω) - 9.0V + 6.0 V - i3(15Ω+20Ω) = 0 i1 = (i3(15Ω+20Ω) + 3)/10 i1 = 0.3 + i3(3.5) ...................eqn 1 i3(15Ω+20Ω)+i2(5Ω+12Ω) - 4.5V = 0 i2 =...
12. ### Kirchhsoff's Circuit Law (Loop Rule Equation)

1) Please take a look at the attachment below in order to solve the problem. Using the figure at the right determine the values of i1, i2 and i3. Input your answers in the form "a.bc x 10^(y) A". 2) Using the correct results from #1, determine the following. For A and B you must also...
13. ### The Rate at which kinetic energy changes to thermal energy

A potential difference of 50 mV is maintained between the ends of a 9.70 m length of wire whose cross section area is 25.0mm^2. The conductivity of the wire is 6.80 x 10^6 (ohm.m)^-1. Determine the rate at which the energy in the wire is transformed into kinetic to thermal energy. 2. Homework...
14. ### The rate at which the energy in the wire is transformed into kinetic

My professor says my answer is wrong.

Thank you.
16. ### The rate at which the energy in the wire is transformed into kinetic

Homework Statement A potential difference of 50 mV is maintained between the ends of a 9.70 m length of wire whose cross section area is 25.0mm^2. The conductivity of the wire is 6.80 x 10^6 (ohm.m)^-1. Determine the rate at which the energy in the wire is transformed into kinetic to...
17. ### Precipitatition Titremetry

PAg means the P-function of Ag.
18. ### Precipitatition Titremetry

Homework Statement Calculate the pAg after the addition of 5ml, 40ml, and 45ml of 0.05M AgNO3 to 50.00ml of 0.04M Kbr (AgBr Ksp = 5 x 10^-13) Homework Equations The Attempt at a Solution when 5ml of AgNo3 is added , we have (50 x 0.004 - 5 x 0.05)/55 = 0.0318 P(kbr) = -log...
19. ### Lifting Problems

Finally found a solution to the problem. W= ∫ py dy from 0 to 150 p = 4 W = 4∫ ydy W = 4[y^2/2] W = 4 [11250] = 45000 I Think this is the right answer to the problem.
20. ### Lifting Problems

Homework Statement Find the work done in winding up a 150 ft cable that weighs 4.00 lb/ft. Assume that the weight includes the gravitational force. In order words exclude the gravitational force g in your calculation. Homework Equations W = ∫ pgA(y)D from a ft to b a = area P =...
21. ### Electric Field

You are very gifted in the field of physics, please do you have any advice on how I can get a better understanding of the material?
22. ### Electric Field

Thanks so much... I appreciate your assistance...
23. ### Electric Field

and P= (-12cm, -176.2cm)
24. ### Electric Field

is Q2= (-12cm, -27.2cm)
25. ### Electric Field

please can you give me the right answer and tell me how you got it. I still cant figure it out
26. ### Electric Field

the coordinates of q2 will be (-12cm 1.92m) I got 1.92 by taking the sum of 0.428m (which is the distance between q1 qnd q2) and 1.49m
27. ### Electric Field

The question says "Determine the coordinates of the location where the net electric field due to Q1 and Q2 is zero"
28. ### Electric Field

P is the point where the electric field is = 0. which is 1.49 m.
29. ### Electric Field

But since we know the coordinates of y coordinates of Q1 and P. Will it be legit to subtract their distances to get Q2
30. ### Electric Field

I guessed the answer, but I know its wrong because y coordinates of p cannot be thesame as the y coordinates of q2.