Colbie Caillat's Sound Waves

Four days away from Christmas break!! i cant even concentrate on school.. ugh well guys still maintaining that B in physics! but gotta raise, ughh theres no room for rest. anyways, waves and oscillations are the topics of the week. I figured we hear hear music every where we go and we all have a favorite artist, right? My all time favorite is Colbie Caillat, even Britney Spears cant top her. Do you ever wonder why a certain artist may appeal to you (other than the type of music they're singing)? It's their voice. Colbie Caillat's voice is relaxing and smooth which is why I'm drawn to her. She sings her high notes soft and low notes loud. Higher notes travel faster than lower notes, or have a shorter period and higher frequency, and vice versa. Sound waves are invisible but you can test its abilities through objects. Their waves travel the fastest through solids, then liquids, and then gases. Have you ever wondered why its louder when you put your ear against the desk and tap your pencil than when your ear isn't? it's because the sound waves of the pencil tapping is more concentrated in that area than when your ear is exposed to the sound of the pencil tapping and the environment you're in.

Shaving legs

I have some exciting news my loyal followers! I just got my first B on a test! Not a B-, but a legit B!! Yay! Alright, enough celebration, there's still time for failure. So as we all went through puberty and started getting hairier, we've gained a habit of shaving weekly or often. Your smooth legs, or armpits, or whatever you're shaving is a result of friction. The friction between the blade and your hairs causes the blade to cut your hairs very close to your skin, without cutting it. Another everyday example of friction is flossing your teeth. Your dentist always tells you to floss but why? Because it helps prevent cavities. The friction between your tooth and the floss causes plaque to slide off and not grow into nasty cavities. :)