Guitars

Sounds are created when playing the guitar by the physics of waves and oscillations. When the string is plucked, a wave is formed, that moves the particles in the air as well as the particles of the body of the guitar. The body of the guitar provides a greater surface area for which sounds waves to go through, making the sound louder. Different notes, or different pitches are formed by shortening or lengthening the wavelength. Which is why a different note is played when you put your finger on different frets. WOW!

springs

At home, when your parents ask which spring is harder to pull then the other, you can do a simple physics experiment to figure it out. Just hang the two springs and put equal weights on both. The one the pulls down farther from the starting position has a lower spring constant, or k. Because of the equation F=kx where F is the weight and x is the distance it stretches. Yay for physics!