shayne and carolyn standing waves

We used the normal setttings for the camera. when we measured the string it was .7 meters; therefore the wavelength is .7 meters also. Our frequency was 42. To find the speed we mulitplied the two together to get 29.4 m/s

Standing Waves Photo-Shannon and Stephane

For these pictures, we used a camera at the regular settings but the one of the settings was set to infinity to capture the wave itself. We set the Hertz to 48.7 and measured the wave itself. The wavelength was .725 meters long. Take the Hertz and multiply it by the wavelength. So that would be .725m*48.7Hz and that equals 35.31m/s. That was how fast the waves were traveling at 48.7Hz.

Standing waves Mack and Adam

For the standing wave I just used the normal settings on the camera. To determine the speed i measured the wavelenght that came out to be .7 meters. I used the frequency given which was 49hz. so to find the speed of the wave i multiplied the two together to get the speed of the wave which is 34.3m/s.

Decibel Levels Around the School-Shannon and Stephane

A scale based on the multiples of ten, which was originally called the logarithmic scale, now called the decibel scale. The faintest sound that a human ear can detect is known as the threshold of hearing. The most intense sound that a human can hear without causing any physical damage to their ears, is more than one billion times the threshold of hearing.

Jimmy & Adam (Decibels Levels Around School)

The faintest sound a human can hear is also known as the threashold of hearing. The range of sounds humans can detect is very large. The scale physicists use is based on multiples of 10. For example, the lowest "level" there is, is level 0. If a sound is 10 times more intense, it is 10db. If its 100 times more intense, it is 20db.

Standing Waves

To capture this image was used an open shudder so we could capture the up and down movments of the string. The way we found the speed was taking the frequency used and finding the wave length of the string and calculating the two together to find the speed. Using our freq. of 49 Hz and Wave length of 70 Cm or .7M we found a speed of 34.3 M/s

Mack & Charley (Decibel levels around the school.)

The range of intensities the human ear can pick up is so large that the scale used to measure the intensity is a scale based on multiples of ten. This scale is also known as a logarithmic scale. This scale is also known as the decibel scale. The threshold of hearing is at level 0db. A sound that is 10 times more intense will be at level 10db. A sound that is 100 more intense would be 20db because of the equation 10*10.

Decibel levels-Carolyn and Shayne

A decibel is a unit used to measure the intensity of a sound or the power level of an electrical signal by comparing it with a given level on a logarithmic scale. On the decibel scale, the smallest audible sound (near total silence) is 0 dB. A sound 10 times more powerful is 10 dB