Guitars are phySICK

This is a picture of two guitars in my house.  Guitars can play a wide range of notes, or frequencies.  We learned that the formula for a string's frequency is: f=v/2L.  Coupled with the V=sqrt F/m/l equation, we can explain why increasing the tension increases the frequency: if force (tension) is increased, then velocity is also increased, and therefore, frequency is increased. You can also shorten the length of the string played, and decreasing the length will also result in a higher frequency.

I could apply the physics knowledge in this blog and become the next Jack Johnson.

Blog #11 Swing Resonance

http://griffinphysics.blogspot.com/2011/12/physics-swing-circular-motion-blog-5.html

This swing in this blog's video demonstrates the concept of resonance.  If I push at the right time and create a "standing wave" I can increase the amplitude of the wave.  The amplitude in this instance is the height of the swing, by pushing the swing when it is going forward, I can create resonance.  The frequency and wave speed will still remain the same. If I increased the frequency of the swing, then the wave length would decrease.