Speed Of Sound In Rubber Band

By increasing the tension we increase the wave speed and the pitch of the sound made when the string is plucked.

Speed of sound in rubber band.

One of the reasons for this is that the elastic properties are different for different materials. The speed of sound is also different for different types of solids liquids and gases. 1522 sea water at 30c. You can actually see the increase in vibration strength.

Elastic properties relate to the tendency of a material to maintain its shape and not deform when a force is applied to it. Speed of sound in thin long solid bars is given by young s modulus for rubber y 4 10 n m and density ρ 1 2 or so. The vibration causes the sound. When i saw the instructables rubber band contest i remembered a toy that my grandparents had that fascinated me.

Differences in pitch are caused by the speed of vibrations. Even though you can t see the air vibrating your ear can hear it. Given that its density is far greater than air however the speed of sound in. As it picked up speed it would start buzzing.

Repeat the experiment and look closely. 1545 butyl rubber carbon 100 40. 1450 sea water at 20c. You held on to the end of the string and spun the bee around.

The rubber band in turn pushes on the nearby air making it vibrate. One would expect the very small elastic constant to make the speed of sound in rubber far less than other solids. The shear modulus of a string or a rubber band is equal to the tension. Speed of sound in rubber using the above formula 57 7 m sec.

You should be able to see the difference in the movement of the string in the two trials. It s a little annoying if one person has to hold the rubber. Sea water at 0c. Since the vibration causes the sound when the vibration stops the rubber band stops moving the sound also stops.

Speed of sound m sec. It was a simple cardboard bee a rubber band and a string.