5.Conclusion




5.1 Practical Applications


The world is running out of resources and we must do all we can to preserve it. through our research, we found out that waves are stronger when the sources are set at specific distances and frequencies. microwaves uses waves to heat up food, using what we learnt, we can increase the intensity of the waves while using the same or less power through resonance, the same concept can be applied to theatres to produce a larger sound with the same or less energy. Thus conserving energy. In other cases, stronger waves are not wanted such as in car bumpers where we would want to it to not resonate. Using the same concept, we can avoid the lengths at which whatever material the bumper is made of to reduce resonance.


An real life example of resonance in play is the catastrophe of the Tacoma Narrows Bridge on november 7, 1940. Strong wind hit the bridge, vibrating it at just the right frequency for resonance to occur, causing the bridge to sway intensely. this in turn caused the bridge to collapse. We could apply our research into designing the bridge and pick different materials with different resonant frequencies so that resonance would not occur and hence , prevent the destruction of the bridge 
(Taken from posterus, 2012)


5.2 Areas for further study


Area of further study:

We can further our research by using sound to levitate objects. sound are pressure waves and pressure can affect physical objects, this pressure produced by sound is usually unnoticeable but using resonance, the pressure can affect light objects, in our experiment, we put some foam balls in the tube , during non resonant frequencies the balls stayed still but during resonance, the balls were pushed and held in place in the middle of the tube by nodes, many balls were lifted from the bottom of the tube. If this area is further researched into, we can use sound to handle things like delicate computer chips thus preventing from being damaged by human fingers.




  
Pictures of the styrofoam balls at 2nd harmonics


we searched the internet and found a research in the topic :

In the past, scientists have used everything from laser beams to superconducting magnetic fields to levitate objects.The principle behind the acoustic levitation is simple: Sound waves, which are waves of high and low pressure that travel through a medium such as air, produce force."We've all experienced the force of sound — if you go to a rock concert, not only do you hear it, but you can sometimes feel your innards being moved," Drinkwater told Live Science. "It's a question of harnessing that force."By tightly orchestrating the release of these sound waves, it should be possible to create a region with low pressure that effectively counteracts gravity, trapping an object in midair. If the object tries to move left, right, up or down, higher-pressure zones around the object nudge it back into its low-pressure, quiet zone.But figuring out the exact pattern of sound waves to create this tractor force is difficult, scientists say; the mathematical 

equations governing its behaviour can't be solved with a pen and paper. (Live Science, 2015)


Area for further study:

In dramas and videos, you see people breaking wine glasses by singing high pitched sounds. How exactly do they do that? they use the resonance effect. When they sing at certain frequencies, there will be resonance effect and the sound produced will be louder, hence the sound waves stronger. The sound waves are so string that it is able to shatter the glass.

"How do you break a wine glass by singing loudly in front of it? Sound waves allow us to do some pretty neat things when we know how to use them. Light waves, too, interact in special ways with the objects around them. 
The behavior of sound and light waves explains why we hear sounds from musical instruments and why we see color and objects. We already know that waves originate from vibrations. Sound waves come from mechanical vibrations in solids, liquids, and gases. Light waves come from the vibration of charged particles."  (Study.com)

Using this information, we can research on what is the frequency required to break the glass. and hence use our results to understand how we can prevent glass shattering accidents due to sound waves.


Area for further study:


Resonance and swings
"Kids on swings say 'push me' because they know that with every push they can go a bit higher, as long as the pushes are in time with the swing. 
That fundamental law of the playground sums up the basics of resonance — if energy is added to something at its resonant frequency, it can store more and more of that energy by vibrating at that resonant frequency: it's resonating. 
So to make something resonate, you need to know its resonant frequency (the frequency it naturally vibrates at when you add energy to it, like by pushing, poking or hitting it). Then you just add energy at that frequency and watch the vibrations build. We naturally push swings at their resonant frequency (say every three seconds), and they store that push energy by oscillating higher and higher.
Rhythmic pushing by a responsible adult is one way of adding energy at a particular frequency, but it's not the sort of spontaneous event that really takes off in nature. In the real world, the regular hits of energy that create resonance generally come from waves. 

Water waves, pressure waves (including sound waves), electromagnetic (light) waves — they're all sources of energy that come in a range of frequencies, so they can all cause resonance by pushing other things. And given the right kind of cavity to bounce around in, waves can resonate with themselves too." (ABC Science)

(Taken from ABC Science)
Using this, we can research into how resonance affects much more than just in the sound area. We can conduct and experiment on how resonance effect is present in light waves as well as swings. 






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