# Search results

1. ### Wire tensions homework

Ok.....i got it using the fact that notes is corresponding to the fundamental frequency....Thanks...
2. ### Oscillation of cylinder attached to two springs

Oscillation of cylinder attached to two springs.... Homework Statement A solid uniform cylinder of mass m performs small oscillations due to the action of two springs attached at its topmost point. Spring have spring constant k. Find time period of these oscillations in the absence of...
3. ### Wire tensions homework

And what is the significance of saying that they are from the same source?
4. ### Wire tensions homework

Are you talking about the concept of standing waves where the length is an integral multiple of (wavelength/2). In this case they are not talking about any particular frequency (fundamental or 2nd overtone 3rd overtone whatever....).....So how do i get the wavelength?
5. ### Stationary waves equations

I am still not clear..how are they travelling in the same direction? if the velocities have opposite sign....
6. ### Change in density of water

my answer is 2.12618 and answer in the book is 2....I guess they are expecting this answer .......But ya it should be close as we are dealing with values of pressure musch lesser than Bulk modulus of water.....But this is'nt a correct method is'nt it? Neway.....thanks a lot for your help....
7. ### Change in density of water

Ok...thanks i will try it.... I am sorry i didnt notice your reply for a long time.....
8. ### Oscillations of a complicated spring block system

Homework Statement A 4kg block M in horizontal plane is attached to a sprig S1 fixed to a light rod OA of length 4m as shown in diagram(refer to attachement). The other end O of the rod is hinged to rotate in the plane about the vertical axis passing through it. A spring S2 is fixed to the mid...
9. ### Current electricity and circuits

This time....the current through current is independent of K2.....right..... In the book the answer for internal resistance is as you say 0 but R1 is 50.... But R1 cant be non zero because in such a case the current in ammeter is not independent of k2.....Isnt it? So R1 = 0 and Ri being 0 is...
10. ### Electrostatics - Finding amount of heat in a circuit

Please can anyone point out if there is any error?
11. ### ELectric field inside a cavity

Hmmm......you are going by repulsions and i was trying it explain it by thinking that potential has to be same throughout so if there is accumulation of extra charge at some point it violates this and hence doesnt make sense.....That is fine it we are talking about a solid conducting sphere with...
12. ### Current electricity and circuits

Ya.... i agree with you.....So basically it seems there is something wrong with the question isnt it? I guess better off leaving it.....Just wanted to confirm that my concepts are fine..... Thank you gneill....
13. ### Intensity and Superposition of waves

Hi jambaugh...thanks for your reply .... I got the identity but how does it apply here? im afraid i still didnt get much of a clue about how this equation comes.....
14. ### ELectric field inside a cavity

Hey Berko.....thanks a lot.....your explanations almost perfectly satisfies my queries.....But one small thing.....You say that the charge distribution on the outer surface is uniform and it has no connection with whatver is inside and i have read this thing in books but no where have they given...
15. ### Intensity and Superposition of waves

Intensity and Superposition of waves.... Homework Statement Incident wave y=Asin(ax + bt + pi/2) is reflected by an obstacle at x=0 which reudces intensity of reflected wave by 36%. Due to superposition a resulting wave consist of standing wave and travelling wave given by y= -1.6 sinax.sinbt...
16. ### ELectric field inside a cavity

I am waiting for some more replies...please....
17. ### Current electricity and circuits

Waiting for a reply soon.....thank you....
18. ### Standing waves

Any help here?
19. ### Stationary waves equations

But how can one write it as sin(w't+kx)......w has to remain same and has to be positive... And ya....how does it explain why 2 and 3 can not form a standing wave?
20. ### Electric field

Field in side the conductor is zero ....But i am not getting what you meant by charge density/distribution on a line between O and S.....
21. ### Electric field

Hi...i am really sorry all af them are perfect spheres....actually i drew this using paint so this is what i managed ....
22. ### Wire tensions homework

Ok.....so notes are simply their frequencies? ok if so then i am assuming both wires to be of the same material....I have velocity given by √(T/density*A) ...here T = tension , A=cross sectional area.....Now i have the ratio of their velocities.....But if i want to use f=v/wavelegth i dont...
23. ### Longitudinal and transverse waves

Longitudinal and transverse waves.... Homework Statement A string is stretched so that its length is increased by 1/n of its original length. The ratio of fundamental frequency of transverse vibration to that of fundamental frequency of longitudinal vibration will be? Homework Equations...
24. ### Stationary waves equations

The direction of wave is determined by the sign of the quantity (coefficient of w/coefficient of x) it its is positive then the wave is travelling in -ve x direction and vice versa.....That is my explanation.....
25. ### Electric field

All of them are spheres and ya the inner sphere is empty and outside it its solid conducting material.... And i think gauss law applies.....not sure though because there is no symetry....will gauss law help..... Basically how to do it?
26. ### Stationary waves equations

No..... they are opposite..... 2 is in the +ve x direction and 3 is in the -ve x direction....
27. ### Stationary waves equations

Stationary waves.... Homework Statement Which of the following equations can form stationary waves.... 1. y=Asin(wt-kx) 2. y=Acos(wt-kx) 3. y=Asin(wt+kx) 4. y=Acos(wt+kx) Homework Equations The Attempt at a Solution Answer is 1,3 and 2,4 which is obviously correct...But why...
28. ### Wire tensions homework

Homework Statement The lengths of two wires are in the ratio 1:2, their tensions are in the ratio 1:2 and their diameters in the ratio 1:3 . The ratio of the notes they emit when sounded together by the same source is? Homework Equations The Attempt at a Solution How to do this...
29. ### Standing waves

Standing waves.... Homework Statement If two waves differ only in amplitude and are propagated in opposite directions through a medium, will they produce standing waves. Is energy transported? Homework Equations The Attempt at a Solution About the first part i think they do...
30. ### Net Capacitance - Hexagon

Hi cupid.callin..... We know that B,F and C,E are at the same potential....So by drawing a simplified diagram of the problem (With A and O at the ends) i do come to an answer (which is not a good looking one!)......So you can go ahead like that....