# Search results

1. ### A Question about Torque....

I thank you all for your help....Much appreciated...
2. ### A Question about Torque....

Heres the picuture...I apologize for inconvenience
3. ### A Question about Torque....

Okay...I have a question.In the case described in the picture, the medium between the two forces, which would normally cause stationary or uniform circular motion, is not straight..The moment arm of each force is equal, and the forces are also equal...Now my question is, would the sum of torques...
4. ### B A Question about Charging by Conduction

When we simply touch a negatively charged metal rod with a neutral metal rod, the charge distributes itself over the both surfaces...I am asking if this is possible in my case???
5. ### B A Question about Charging by Conduction

Okay...Is it possible to charge a metal, by conduction, using only a single terminal of a battery???...Like it we touch only the negative terminal with the metal, is it going to get a negative charge??...If not, then why???
6. ### A Question about potential difference in Wire

Okay...I got a question. Charges move in a wire due to an electric field across its ends. Now, positive test charge in an electric field would have higher electric potential nearer to the positive plate than anywhere else. Now in case of a circuit, like the one I have drawn, the electric...
7. ### B A Question about Energy conversion...

Okay...Suppose we we lift up something from the ground upto a certain height. By doing so, we have imparted it some potential energy. If we now let go, it will start converting its potential energy to kinetic energy.Now, suppose we apply this analogy to the case of a positive charge place nearer...
8. ### B A Question about Effect of Surface Area on Loudness

This is the diagram
9. ### B A Question about Effect of Surface Area on Loudness

Okay... I have a question about "effect of surface area on loudness".I am going to upload a diagram along this post.It shows two scenarios. The "red thing" is a barrier, which allows absolutely no air contact between the speaker and the listener. So the only way the sound can travel outside is...
10. ### A Question relating to Loudness and Transmission of Sound

I have another question closely related to this topic. So I am going to post it in the same thread.I am going to upload a diagram along this post.It shows two scenarios. My question is simple, is the sound from the speaker going to be louder for the listener in the second case (the case with the...
11. ### A Question relating to Loudness and Transmission of Sound

Well, I was thinking that when it is a single solid wall, any loss in amplitude of wave would be due to Boudary Behaviour (reflection and transmission) at the entry point from this face of wall and exit point from the other face of wall.( If we do not take Inverse-Square Law into consideration...
12. ### A Question relating to Loudness and Transmission of Sound

Okay...I have a question and I am going to describe it using a scenario...Suppose there are two persons in two different but adjacent rooms. The wall in-between these rooms is 3 inches thick. There is absolutely no way for air to cross between the rooms. Now, one of the persons speaks and the...
13. ### A Question about Sound Waves Propagating Through a Large Metal Cube

Well, most of my confusion has been resolved. But I do have one last question. As you said "The displacement of the steel surface is very small and doesn't couple sound into the air very well". The sound can be heard if one is right next to the "distant train". The reason is that the wheels of...
14. ### A Question about Sound Waves Propagating Through a Large Metal Cube

Well I dont think so that my question indicated that I was hung up on the shape. In your case, You had to press your ear against the track in order to hear. But what if you were standing at some distance from the tracks. Now, you could not hear the wheels. Now, the only way which I can think of...
15. ### A Question about Sound Waves Propagating Through a Large Metal Cube

Well, if we are gonna talk about "which sound reaches first", then the sound through the cube will reach first. But I actually wanted an answer about whether the sound propagating through the cube will have enough amplitude left when it reaches the end B, when some of its amplitude is decreased...
16. ### A Question about Sound Waves Propagating Through a Large Metal Cube

Okay, I have a very simple question that...Suppose we have a very wide cube(dense and hard)...We place two persons at each of its ends...One the persons strikes its surface at one end. Now this person A will hear the sound due to vibrations of that end's surface (which further vibrate the air...
17. ### A Question about Loudness of Sound...

OKay...Loudness of a sound is "the magnitude of sensation of human ear", or ''how much violently ear drum vibrates due to sound wave" (That is according to my understanding)....Now, increasing the area of vibrating body increases the loudness of sound...My question is that, if we increase area...
18. ### Initial Velocity of a dropped object problem

i understand your confusion...When you drop a ball, its velocity increases by every second.It becomes 9.8 m/s 1 second after leaving your hand.However, when you throw a ball, the only reason the ball goes out from your hand is because your provided it with acceleration, which caused it to have a...
19. ### A Question about Diffraction...

If you look very closely at the two images i posted, you can see that there is the same semi-circular shape of water waves in both images....So where is this "more bending of light in greater diffraction"???
20. ### A Question about Diffraction...

In the first image, the water waves after passing through the slit, form an almost semi-circular shape...However, in the second image, the water waves form the same almost semi-circular shape, even though gap between obstacles in the two images is not same...So what is this "greater...
21. ### A Question about Diffraction...

Okay...I have a question that, I have often read the statement in various topics on diffraction that "Diffraction is maximum when slit is comparable to wavelength of wave". Can someone point out what is exactly meant by ''greater or maximum diffraction'' here?...Like if we are going to talk...
22. ### A Question about the Speed of Waves...

I guessing the problem is my poor understanding of the normal longitudinal waves on spring and sound waves through a spring...Perhaps I will get my answer when someone states the basic difference between the two???Like, I think that speed of normal longitudinal waves on a spring ( different...
23. ### A Question about the Speed of Waves...

I did a bit of reading on this website. http://www.physicsclassroom.com/class/waves/Lesson-2/The-Wave-Equation The solutions to experiments and the questions at the end all point towards "speed of wave is ONLY dependant upon properties of medium"
24. ### A Question about the Speed of Waves...

My question was that, I read that speed of waves in a given medium is always the same (regardless of wavelength or frequency)...Then a person pointed out that light and sound are different types of waves, so their speed is not same ( even in the same medium)...And thats when I took the example...
25. ### A Question about the Speed of Waves...

Let me rephrase...The normal longitudinal waves will b slower than sound waves, despite being same in nature (longitudinal)...Hence it contradicts with the point that waves of ''same nature'' (or a given wave) have same speed in a given medium, which is actually my question???
26. ### A Question about the Speed of Waves...

I see your point...Lets say we take a spring for an example...The normal waves in it ( longitudinal ) will be slower than Sound waves ( longitudinal ) propagating though it...
27. ### A Question about the Speed of Waves...

Okay then what about normal vibration of string and propagation of sound through string???They also have a speed difference..
28. ### A Question about the Speed of Waves...

Okay...I read that speed of a wave for a particular medium is constant, i.e it is independent of its frequency and wavelength...Hence we can conclude for a particular medium, all waves travel with same speed...Is' nt it contradictory with our usual observed phoenomenon..Like, if we take air for...
29. ### B A Question about transverse waves...

In case of a transverse wave in a rope, in which there is only upwards displacement from starting position, there is no such point where net force would be zero (if there is, please point out)...Hence,can we conclude that ,in such types of waves (only upwards or downwards waves), no equilibrium...
30. ### B A Question about transverse waves...

Okay...From your answer. I get that there can be no transverse wave without crests and troughs (the highest and lowest points from mean)...Two things I want to ask you, The mean position I indicated in the diagram is not exactly THE ''mean position'', right???...Second, if mean position is the...