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# Feedback Comments on Wave Motion

by Ron Kurtus

A total of 91 comments and questions have been sent in. They are listed according to date.

## List of next 10 letters

### Country

Wave Motion What happens to two waves travelling on a string? USA

Wave Motion Don't understand scientific process Australia

Wave Motion Has equation for waveform Myanmar

Wave Motion Want to present my equation for wave motion Myanmar

Waveform Noise Can loud noises be used to create electricity? USA

Wave Motion Where is wave motion applicable? India

Wave Motion Interested in water waves and how they travel UK

Wave Motion Does sound travel faster through vibration? USA

Waveform Noise Where does static on the television come from? South Africa

Wave Motion Difference between plain and mechanical waves? Papua New Guinea

Next 10

First 10 letters

## What happens to two waves travelling on a string?

Topic: Wave Motion

### Question

October 13, 2008

What happens to two waves travelling on a string after they travel through each other?

- USA

16638

If they are going in the opposite direction, they continue on as if nothing happened. If they are going in the same direction, they can result in a different waveform in the string.

## Don't understand scientific process

Topic: Wave Motion

### Question

October 10, 2008

How do improvet scientific process question i am in high school. because i do not know how to improvt it. All i study just knowledge.

Ming - Australia

16621

Information simply starts with answering "What happened?" That is just facts.

Knowledge looks into "How did it happen?" or "How does it work?"

The scientific process looks into "Why do these things happen?" Then it goes through a very methodical and logical step-by-step analysis.

Be curious and look behind the simple facts you are taught. Ask questions, especially "Why do these things happen?" That will make things more interesting and open new doors for you.

## Has equation for waveform

Topic: Wave Motion

### Question

February 10, 2008

Dear sir,

Thank you so much for reply to me. Generally, The wave equation is compeleted.B ut that is only for linear dynamic (periodic). So I try to get
the non linear dynamic. The wave equation is based upon the geometrical mathematics which it is a classical machnics.

The equation is very simple that's what I have to be hesitate things.
I'll send to compeleted equation of wave soon.

Sincerely,

ye wint - Myanmar

15320

I look forward to your equation.

## Want to present my equation for wave motion

Topic: Wave Motion

### Question

February 7, 2008

Dear sir,

I would like to present my own equation of wave.I am student from myanmar and I crazy about physics when since I was a young.If you want to see my
equation,I'd like to send it to you.I really want to study in your country.

Sincerely,

ye wint - Myanmar

15297

We mainly show the properties of scientific phenomenon like waves and such. Equations are looking at the mathematical part of wave motion. They are important in being able to predict and model wave motion.

You can send your equation for wave motion. But it is also good to examine the equations used by many other scientists.

I am glad that you are crazy about physics. Study as much as you can. It is a fascinating subject that only the top students can understand.

## Can loud noises be used to create electricity?

Topic: Waveform Noise

### Question

January 7, 2008

Hi, I'm curious how, if possible, enough noise can be harnessed to produce a signifigant amount of electricity. Perhaps more than a microphone. Thanks!

- USA

15060

A microphone is made to create a small current from normal sounds. If you want to create a greater current from a very loud noise, you could set up a huge "microphone" to do the job.

Consider a 250-watt loudspeaker used at a rock concert. If you put a similar large speaker to catch the sound coming out of the 250-watt speaker, you could almost create 250-watts of electricity, using that speaker as a microphone and collecting the resulting current.

## Where is wave motion applicable?

Topic: Wave Motion

### Question

November 30, 2007

what aspects of human life is wave motion applicable to i.e the applications of wave motion

falomo - India

14883

Wave motion is experienced in sound, light, and electronics.

## Interested in water waves and how they travel

Topic: Wave Motion

### Question

November 23, 2007

Hi, first of all I wish to say that your website is of great help. I'm interested in understanding the nature of circular waves, e.g. ripples on water surface. Can you please answer the following question: If I toss a rock into water, it will create a circular disturbance which will travel outwards in all directions (causing ripples which become wider before they eventually die out). Is it right to say that as the wave moves away from its point of origin, it will gain in wavelength but will lose in amplitude until the medium (i.e. water) in which it travels is restored to its original position?

Bianca - UK

14831

Just as a candle will send light out in all directions, a disturbance on the surface of water will send a water wave in 360 degrees from the source. This really is not called a circular wave. There is another type of wave that rotates that is called a circular wave.

When you drop a rock in water, it creates several waves of some given wavelength. Placing vibrating object in the water would create a continuous series of waves.

As the water waves move away from the center or source, their amplitude decreases inversely proportional to the square of the distance. This decrease in amplitude and the fact that the circles are getting larger in radius makes it look like the wavelength is increasing. But if you look at the frequency or rate that the waves pass by a given point, you will see that it is constant.

Note that if you dropped a rock in the exact center of a circular pool, the water waves would go out, hot the walls and reflect back to the center with approximately the same amplitude as they left. Some loss in amplitude would be due to friction losses during the wave motion.

## Does sound travel faster through vibration?

Topic: Wave Motion

### Question

October 31, 2007

I have a science project and i cant find what im looking for.My problem statement is Does sound travel faster through vibration? can you please help me.

Dany - USA

14683

Sound is a vibration or wave motion in a material. Its speed depends on the density and temperature of the material. Sound travels faster in water than air because water is more dense.

Look carefully at a loud speaker, and you will see it vibrate, creating sound in air.

## Where does static on the television come from?

Topic: Waveform Noise

### Question

July 31, 2007

Hallo.

I'd like to know where the static on your television comes from.. More specific, i know that it's from cosmic radiation and other appliances nearby.

What i want to know, the static from cosmic radiation, does it have any resemblance of the big bang.

If you have info on that would u please send me a link to where i can read further on this.

Izak

Izak - South Africa

14134

If you look closely inside an electric motor, you will see small sparks as the shaft turns. Each spark sends out electromagnetic waves that can cause static on a radio or television. Most motors on vehicles and appliances have filters to prevent that static. Also, most radios and televisions have filters to further reduce the static.

If the TV signal is too weak for the television electronics to properly process, the picture and sound can be more sensitive to outside static. Also, the picture and sound may be distorted because of the low signal.

Cosmic radiation is not usually a source of static. When there are storms on the Sun, the radiation can disrupt electronic communication. But that is rare. Cosmic radiation from the Big Bang is extremely weak and requires special instruments to detect.

## Difference between plain and mechanical waves?

Topic: Wave Motion

### Question

June 13, 2007

I think thats good.I've got a question to ask,What is the difference detween plain waves and mechanical waves?Please reply as soon as possible.

Kenny - Papua New Guinea

13929

Sound waves, water waves and vibrations are mechanical waves, meaning matter is moving. Light waves are electromagnetic waves. I have never heard of plain waves.

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