Transformers Extra Credit

Waimalu Park, Sear's Distribution Center, H3, Newtown Estates, Times Coffee Shop in Kailua, Entrance to H3

Electromagnets

This spring break, I went on the California College Tour, and we went to Disneyland on one of our free days. When we went to ride the Twilight Zone in California Adventure, I remembered what we learned in class about electromagnets controlling the falling elevator. An electromagnet has the same characteristics of a permanent magnet, except an electromagnet works when electricity is present, instead of all the time. A magnet is attracted to the elevator, and since it is controlled by electricity, it can be turned on and off. This lets the elevator drop at a high speed for one moment and come to a stop at another moment.

Sound

While in my car, I remembered what we had learned in class so far about sound waves. In this video, the song is being played at a lower volume, then I turned the volume higher. Looking at the singer's voices, the two have different frequencies and amplitudes. Jason Mraz has a lower frequency (lower pitched), while Colbie Caillat has a higher frequency (higher pitched). They also sing some parts of the song louder than others, which would make the amplitude of a sound wave bigger. Although the singing changes frequency every time the singer changes notes, the beat of the song remains the same. Therefore, if I were to analyze one of the beats, the frequency would remain the same at any volume, but as I turn the volume higher, the amplitude of the sound wave would increase. Physics is everywhere.