Standing wave Definition and 192 Threads

Homework Statement A standing wave is produced by small transverse oscillations of one end of a taught string stretched between an oscillator and a fixed point. The frequency of oscillation is adjusted to be resonant at the third harmonic. The amplitude of the string's viabration is very...

Homework Statement An aluminum wire of length l1 = 60cm, cross section area 1.00 x 10-2cm2, and density 2.60g/cm3, is joined to a steel wire of density 7.8g/cm3 and same cross sectional area. The compound wire loaded with a block of mass m = 10kg is arranged as shown so that the distance...

My Friend and I were discussing standing waves and I made problem about speed, inspired off a concept taught in my Physics book: v = \sqrt {\frac {F_T}{m/L}}. My Friend asked a very valid question: "How in the whole can you defined speed of a standing wave when it's not changing position?" - He...

Hi everybody, that's my question, I have been measuring the standing wave pattern within a waveguide (X band) using a slotted line, I put a short circuit termination and the theory said that we expect a rectified sine, but I don't get that, my result is in the picture I can't explain my...

Has path of a standing wave confined inside a metal box been measured and described? I'm thinking path is circular, or, oscillates/bounces back and forth like a pendulum. I'm thinking of a standing wave moving inside a metal rectangular box. Has the path of a standing wave inside a...

I came across a question about wave from univeristy physics (sears n zemansky) and the question was 'can a standing wave.be produced on a string by by superposing two waves traveling in opposite direction with same frequency but different amplitudes? And same amplitude but different...

Homework Statement a 50m length of string with mass 0.0175 kg has waves traveling at 112 m/s. There is a mass attached to the string, 0.45 kg that is creating a 4.41 N tension. What is the frequency of the string vibrator? Homework Equations v=f*λ f= [√T/(m/L)]/2L The Attempt at a...

What kind of wave is Asin(kx)sin(wt)? Using trig functions, I've rewritten it as Bcos(kx-wt) - Bcos(kx+wt) So it sort of looks like it's a standing wave in that it's a superposition of two waves traveling in opposite directions with equal amplitude and wavelength, yet I'm unsure since...

Hi, first post, so take it easy on me, I've had an idea for producing metallic objects with high surface area for several years, but lack the necessary physics knowledge to act on it or, really, inclination (and money) to go through years of school to gain such. The idea is as follows: A...

Homework Statement using a wire of length L= 1 M with both ends fixed, can you produce a standing wave with the following wavelengths? Explain why or why no. a. 30 cm: b. 1m : c. 75 cm : d. 2 m : Homework Equations L=n. (λn/2) The Attempt at a Solution 1m= n. 30 cm/2 ?

Homework Statement A string with both ends held fixed is vibrating in its third harmonic. The waves have a speed of 192m/s and a frequency of 240 Hz. The amplitude of the standing wave at an antinode is .4cm. Calculate the maximum transverse velocity and the maximum transverse acceleration...

Homework Statement A sphere of mass M=6.85 kg is supported by a string that passes over a light horizontal rod of length L=0.73 m. Given that the angle is θ=22.3° and that the fundamental frequency of standing waves in the section of the string above the horizontal rod is f=246 Hz...

Homework Statement de Broglies standing wave condition demands that an inegral number of wavelengths fit into the circumference of the Bohr orbit. How many "interal wavelengths" are there in the fourth exited state of Be3+? Homework Equations n lambda = 2 pi r The Attempt at a...

Homework Statement A standing wave in a pipe with both ends open has a frequency of 396 Hz. The next higher harmonic has a frequency of 662 Hz.(a) Determine the fundamental frequency. answer: 266 Hz (b) How long is the pipe? answer : 0.645 m The Attempt at a Solution...

Homework Statement As in the Title starting from two planewaves with the same amplitude, but different frequency. Homework Equations Starting from Ae^{i(kx +\omega_1 t)} + Ae^{i(kx +\omega_2 )} The Attempt at a Solution I got as far as Ae^{i(kx +\omega_1 t)} + Ae^{i(kx +\omega_2 )} =...

Okay, I know that I should know this, but its just been a while so here it is: I have a few emitters at 2.5 GHz at different points on the edge of a sphere of water. I want to find the RMS energy transmitted into the water in the sphere. Ideally by moving emitters/adding a phase delay, I...

Homework Statement If you have seen the treatment of calculation of density of states using standing wave formalism in Modern Physics by Arthur Beiser, their are these observations of which i am not completely convinced, with wavelength fixed, he transforms wavelength into energy, using...

Note: This is a laboration assignment. Homework Statement I want to theoretically determine the frequencies of the standing waves that occurs in a Chau gong when exposing it to a camera flash (Nikon sb-900) from a given distance. These shall then be compared to the frequencies obtained from...

Homework Statement A standing wave is established in a string of length 150 cm fixed at both ends. The string vibrates in four segments when driven at 140 Hz. Find the wavelength in meters. Find the fundamental frequency. Homework Equations L = Nλ v = fλ The Attempt at a...

Standing waves have a fundamental frequency equal to 4x the length of the pipe if the pipe is closed at one end and open at the other end. So, blowing across the top of a 33.2 cm bottle should produce a fundamental frequency of v/4L or about 340/1.2= 283 hz. When I record the sound produced...

Homework Statement Two sinusoidal waves with identical wavelengths and amplitudes travel in opposite directions along a string with a speed of 10 cm/s. If the time interval between instants when the string is flat is 0.50 s, what is the wavelength of the waves? Homework Equations v = w/k =...

Hello there! I was thinking is it possible to observe a simple longitudinal oscilator (lets say a mass on a string) as a standing wave? Thinking maybe as wave which has a front 4 times than the size of the string. So when we excite the string, we are actually emmiting a wave. One...

How can we predict whether, a wave ( say a one dimensional string wave) traveling in any direction (say +x) after reflection from the fixed end, forms a standing wave in the medium or not (here string)? I do not understand why the length of stirng should be integral multiple of wavelength(...

This question is for a conceptual physics class (no trig involved). 1. The wave speed on a tightened guitar string is 880 m/s. What is the shortest length of string that will produce standing waves of 440-hertz frequency? (Be very CAREFUL!) a. 0.5m b. 1.0m c. 1.5m d. 2.0m e...

Hi I am trying to develop a standing wave inside a rectangular cavity and detect it using a microphone.In one wall of the cavity ,I placed a loudspeaker and driving it at a frequency of 8.3 Khz. The chanel has a thickness for half wavelength standing wave. I am trying to detect the nodes...

Homework Statement A spring is held vertically between two supports separated vertically. That stationary wave set up looks like this: http://img690.imageshack.us/img690/9417/80122335.jpg Deduce what you can about the speed of the waves in the spring. (Note that the wave pattern is slightly...

I am seeking to understand the relationship of energy within a standing wave vs. the energy in its first three harmonics. Is the energy latent within the fundamental wave the same as the energy in its first three harmonics, or is the energy and exponential increase. IE How much energy is...

Here's a scenario about which I have doubt. Consider a transmission line which has a length λ/4 and which has open circuit at load end. The source resistance is zero. The source voltage be Vs and the source frequency is sufficiently high to be considered as high frequency application . The line...

Has anyone come across, or may be able to point me in the direction of a method for evaluating the inductive reactance of a circular loop when the wavelength of the applied signal is significantly less than the conductor length of the loop - and more particularly when; A. The driven...

My lecturer said that a standing wave is formed when two waves that travel in the opposite have the same frequency. He said that if the waves are y1 and y2, then the resulting wave y can be given as the sum: y = y1 + y2. y = Asin(\omegat - kx) + Asin(\omegat + kx). (1) Where the...

SHOW THAT THE INFINITE WELL'S STANDING-WAVE FUNCTION CAN BE EXPRESSED AS A SUM OF TWO TRAVELING WAVES OF THE FORM Ae^i(kx-wt) Homework Equations The Attempt at a Solution

Homework Statement The problem is the same as the title; to find the relation between wave speed and tension for a standing wave in a string. (Fixed ends) Given data (from the experiment) String length = 1.62m, mass is negligible Frequency = 48.2 Hz Basically one end of the string was...

Homework Statement When mass M is tied to the bottom of a long, thin wire suspended from the ceiling, the wire's second-harmonic frequency is 200 Hz. Adding an additional 1kg to the hanging mass increases the second-harmonic frequency to 245 Hz. What is M? f_{2} = 200hz, m = M f_{2} = 245hz...

I just completed a lab in which we created standing waves in a fixed length of pipe using a function generator. An oscilloscope was used to measure the amplitude of the waves. The frequency was changed until a resonant condition was met, and then the location of all the nodes/antinodes was...

Homework Statement A standing wave is set on a string by a vibrating the string at one end. You count 4 nodes on the standing wave. Which harmonic have you produced? The Attempt at a Solution I thought it was 3rd harmonic,but my teacher put 2nd harmonic whos right?

As I https://www.physicsforums.com/showthread.php?t=283482", I'm struggling with physical basics of vibration in rods as a non-physicist. If someone would be kind enough to explain in simplest possible terms, I would like to understand two things: 1. What is the relation between standing...

Why does half a wave length and not a full wave length constitute the first harmonic? v=\lambdaf because a standing waves can be made with two half waves traveling in opposite directions?

Homework Statement A guitar string is vibrating in its fundamental mode, with nodes at each end. The length of the segment of the string that is free to vibrate is 0.386 m. The maximum transverse acceleration of a point at the middle of the segment is 9000 m/s^2 and the maximum transverse...

Homework Statement "A standing wave in the form of a string attached to a driven tuning fork is created. We then move the furthest boundary point to a node somewhere along the string. The node of course was originally at rest by definition. The string behind the node with the boundary point...

can we get a standing wave in a string if we affect with with two waves with same frequency on it . thanks...

Homework Statement If you take snapshots of a standing wave on a string, there are certain instants when the string is totally flat. What has happened to the energy of the wave at those instants? The Attempt at a Solution I'm assuming that nothing has happened to the energy. At...

Homework Statement A brass tube of mass 20 kg and length 1.1 m is closed at one end. A wire of mass 9.6 g and length 0.4 meters is stretched near the open end of the tube. When the wire is plucked, it oscillates at its fundamental frequency. By resonance, it sets the air column in the tube...

Homework Statement If a standing wave is produced by two identical waves traveling in opposite directions, is the wavelength of the resultant wave simply the wavelength of the original wave? Homework Equations ysin(kx)cos (wt) The Attempt at a Solution I'm pretty sure it...

A microwave generator can produce microwaves at any frequency between 10 GHz and 20 GHz. The microwaves are aimed, through a small hole, into a "microwave cavity" that consists of a d = 8 cm-long cylinder with reflective ends. Select all frequencies from those tabulated below which will...

Homework Statement A 1.0m long vertical tube is filled with water. A tuning fork vibrating at 580Hz is held over the open top of the tube as the water is slowly drained from the bottom. At what water heights, measured from the bottom of the tube, will there be a standing wave in the tube...

Homework Statement Given the first harmonic, with length L, of a certain standing wave, what is the process for coming up with the next 3 harmonics for it?Homework Equations velocity = wavelength * frequencyThe Attempt at a Solution I don't understand how to draw the "next harmonic". I've come...

Homework Statement The standing wave in the picture is oscillating at 100 Hz. What is it's velocity? Homework Equations Velocity=(wavelength)(frequency) I believe is the equation that applies here. The Attempt at a Solution The wavelength from the picture appears to be...

Homework Statement One end of a horizontal string of linear density 4.7 multiplied by 10-4 kg/m is attached to a small-amplitude mechanical 58 Hz vibrator. The string passes over a pulley, a distance L = 1.50 m away, and weights are hung from this end, Fig. 11-48. Assume the string at the...

What happens when an electromagnetic wave reflects of a surface at an 90 degree angle and continues moving along the same path as it came from? Will the two waves that are moving in opposite direction interfer with each other to from a standing wave pattern? This seems to be the case when...