Squares

General FreeBASIC programming questions.
MrSwiss
Posts: 3348
Joined: Jun 02, 2013 9:27
Location: Switzerland

Re: Squares

Then you mul that by the 4.68 hardness of the wineglass ...
Who told you that this is connected, by a simple multiplication?
(This is usually the point, where you loose it all, by such sensless assumptions/guesses!)

If you want to shutter the glass, it depends very well on Frequency ...
(every material, depending on construction (shape) and thickness, has its own.
Last edited by MrSwiss on Jun 15, 2019 22:10, edited 1 time in total.
albert
Posts: 5486
Joined: Sep 28, 2006 2:41
Location: California, USA

Re: Squares

For a building:

You would take the perimeter of the building
And place that on two saw horses at each end, and see how much force it takes to make that span flex.. ( usually a pretty low weight..)
That force is the hardness...

To find the resonance , you would use a vibration or seismic detector , and tap the building and wait for the wave to return..

Then you would take the hardness and mul it by the volume level of water..To find the required woofer volume level.

Then you could earth quake the building, just like the wine glass....
albert
Posts: 5486
Joined: Sep 28, 2006 2:41
Location: California, USA

Re: Squares

You take the speed of waves in water ; 23 meters a second ,
And divide that by the meter diameter of the object you want to earth quake.
And then multiply it by the hardness...

For a guitar with a 24 inch scale-length

Two feet is 0.6096 meters..

23 meters a second \ .6096 = 37.729658793 ; the wave would propagate the strings at 37.729 times a second (37.729 Hz)

Since the guitar "A" string is 440 Hz , then the hardness of the guitar "A" must be just over 10 times the hardness of water.
10 times would 377.29 Hz

11.662 times the hardness of water, would be 440 Hz

Exposing the strings to a speaker pulsing at 37.729 times a second , should make all the strings , ring in their frequency..
Mistake: ( You have to wait for the wave to travel , out and back) So it would be half = 18.8645 pulses a second , to make the strings ring.
MrSwiss
Posts: 3348
Joined: Jun 02, 2013 9:27
Location: Switzerland

Re: Squares

You obviously have no clue about "hardness", which by the way, doesn't play any part
in this sort of equation ... (what is more releveant is the "density" of the material).

It whould probably be better for you, to go back to write: music/lyrics because,
physics is certainly not for you ...
Last edited by MrSwiss on Jun 15, 2019 22:29, edited 1 time in total.
badidea
Posts: 1777
Joined: May 24, 2007 22:10
Location: The Netherlands

Re: Squares

I'm out. Good luck teaching Albert something MrSwiss ...
albert
Posts: 5486
Joined: Sep 28, 2006 2:41
Location: California, USA

Re: Squares

If you know the "hardness" you can calculate the "resonant frequency".
If you know the "resonant frequency" you can calculate the "hardness".

"Hardness" is how much force it takes to flex a span of material.

If i take a span of concrete 2 feet x 2 feet , and 100 feet long , it only takes a few pounds to make it flex..( Hardness )
You could make it flex by jumping up & down on it.. So it might be hardness 12 ?
MrSwiss
Posts: 3348
Joined: Jun 02, 2013 9:27
Location: Switzerland

Re: Squares

bye, bye alfred ...

Have you ever taken the pain, to read up on all topics, we've linked for you?

I very much daubt it, because your crappy answers come by far, too fast ...
Knatterton
Posts: 165
Joined: Apr 19, 2019 19:03

Re: Squares

Albert, instead guitar you should play the donut:

https://www.youtube.com/watch?v=aX1CBYYm3Sw

Then you are able do create real music:

https://www.youtube.com/watch?v=ewyDpCw ... eM&index=5

Thats how this world works!
albert
Posts: 5486
Joined: Sep 28, 2006 2:41
Location: California, USA

Re: Squares

Just name "Hardness" after me , then it might be simple for you guys to understand...

The force it takes to push water down is 1 Redditt

The 4 inch wineglass is 4.68 Redditt's in hardness...

The 440 Hz guitar string is 11.662 Redditt's in hardness

You take a hollow "Fly Fishing" line and lay it on the water, then push it down , the force it takes to push down is 1 Redditt.
albert
Posts: 5486
Joined: Sep 28, 2006 2:41
Location: California, USA

Re: Squares

You might be wondering how the wine glass at 4.68 is softer than the guitar string at 11.662

If you take a rod of glass , the thickness of the wine glass and as long as the circumference is (32 centimeters).

It would flex at under half the pressure of the guitar string.

So: Even though the glass seems harder than the string to flex , it's actually much softer. ( In the waveform world ).
Last edited by albert on Jun 16, 2019 0:13, edited 1 time in total.
albert
Posts: 5486
Joined: Sep 28, 2006 2:41
Location: California, USA

Re: Squares

@Knatterton

I go nuts , for doughnuts , and fill um full of ho nuts..
albert
Posts: 5486
Joined: Sep 28, 2006 2:41
Location: California, USA

Re: Squares

After playing around with different kinds of traffic light poles and stair rails..
It seems like most things made of steel and aluminum , earth quake at around 2 - 4 Hz..

Earth quaking different kind of traffic light poles made of aluminum and steel... 2 - 4 Hz..
albert
Posts: 5486
Joined: Sep 28, 2006 2:41
Location: California, USA

Re: Squares

I don't know if molecular density plays a role in "hardness"

With atoms , the more valences that are overlapped the stiffer the molecule...
With molecules , the more valences that are overlapped the stiffer the substance...

With steel , you cool it slowly it produces barely overlapped valences , more flexible steel ( spring steel is kilned , slowly cooling )
Ice hardened steel is cooled quickly and creates deeper valence bonding, ( harder steel but brittle )

So you would then have to figure the molecular bonding , verses the span to determine flexibility..??? not sure how it would be calculated..
albert
Posts: 5486
Joined: Sep 28, 2006 2:41
Location: California, USA

Re: Squares

Interesting idea!!

Like with steel , cooling at different speeds , causes different hardness, the faster the cooling the harder the steel.
Maybe heating mercury , and then cooling it rapidly , might cause solid mercury??
Richard
Posts: 2984
Joined: Jan 15, 2007 20:44
Location: Australia

Re: Squares

“Hardness” is measured by making a dent in the material with a bearing ball and measuring the diameter of the dent. Liquid water scores a hardness of zero because the ball goes more than half way in. Scratch hardness cannot be measured on a liquid.

The speed of a surface wave on a fluid, such as water, is determined by the strength of gravity and the density of the liquid. It has nothing to do with hardness.

While being quite unproductive, it must be fun exploring a region by avoiding all maps, guidebooks and postcards.

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