Tuning Forks Lab Investigation Answers

Sample Problem 1 A vibrating tuning fork is held near the mouth of a column filled with water. Have the students place the vibrating turning fork in a cup of water and then answer question 10.

Delta Education Aluminum Alloy Tuning Fork 1024 Hz

Have one student from each group strike the tuning fork and place the handle of the vibrating fork on the table next to the pan of water while the other students are observing the water.

Tuning forks lab investigation answers. Then you calculate the wavelength by dividing the speed by the frequency. This is because when tuning forks become chipped they change their inertia and will vibrate at different frequencies. Sound Rarefaction Background Tuning forks were invented in 1712 by John Shore a trumpeter. Involves observing properties of waves doing calculations graphing and thinking about. They come from the position of the resonant fork on the top of the tube it must be centered and not touch the top of the tube but not too high and the second error is the practical measurement of the resonant length of the tube with respect to the water level which can be done at best with an estimated accuracy of 0003 m. If you have a tuning fork of 425Hz it would exite the 3.

Technically 500 Hz means a 500 Hz tone via the audiometers bone oscillator while 512 Hz is the tuning fork frequency. Lab Investigation Delve into the world of sound. You need a table that lists the speed of sound in air as a function of temperature. Owl Pellet Dissection Lab - 2013. If you have a set of tuning forks and lab space with running water you can do this lab. Sound produced by a tuning fork of known frequency f.

For a 256-Hz tuning fork 1 4 l would be approximately 34 cm at room temperature 20C. The closed tube has its lowest resonance at 14 of this - 85Hz. Vibrations can be powerful. How can we use tuning forks to investigate the different properties of sound. Electrical Circuit Lab 2014. Helps students visualize waves in general and sound waves in particular.

I recommend you learn that formula by heart. V f Eq. Students will answer 8c and 9 based on the information about the frequencies of tuning forks. In the Weber test the tuning fork tines are set into vibration and the stem of the fork is pressed against the middle of the forehead. A the wavelength of the sound from the tuning fork. The tests results will be the same whether a tuning fork or a bone oscillator is used.

2 tuning forks with matching frequencies 1 tuning fork with a different frequency rubber striking block or bottom of shoe large tray with 1 water. For this lab our procedure consisted of our graduated cylinder with the PVC pipe and water being placed on our desk. If these disturbances are sent down a gas-filled tube and reflected back up the tube. Soil Properties Lab - 2013. This would make sense since bone conduction is required as part of hearing. Have the students place the vibrating turning fork in a cup of water and then answer question 10.

Also the lower frequency tuning forks make lager splashes. When struck with a small mallet the tuning fork vibrates with a certain frequency putting an audio tone into the air. Repeat your measurements by increasing the water level in the tube. The vibration of the tines of a tuning fork creates regions of compression and rarefaction In the gas. The tuning fork activity teaches the science of sound and demonstrates how sound travels in vibrating waves through the ear. At the Drums Station students will place a paper on top of the drum and some beans on top of the paper.

My volunteer noticed that the sounds was louder when the tuning fork was touched to his head as compared to holding it near his head. It is best to hit the tuning fork on a knee or the ball of your hand avoiding metal on metal. In the bone conduction activity was the sound louder on the side of the head where the tuning fork was touched. Also the lower frequency tuning forks make lager splashes. Phases of the Moon Lab 2014. The errors in the results for speed of sound lab are systematic.

The fork is actually a harmonic oscillator and when struck. A vibrating tuning fork generates a sound wave that travels outward. Tuning Forks Lab - 2014. String approximately 15 inches Ping pong ball Tape Tuning fork Hard surface such as a. The second overtone would be 5 times this 425Hz. A closed tube has resonances at 14 34 54 wavelengths.

Find as many resonances as you can for tuning fork one. Additionally they will use the tuning forks provided to investigate the interaction of sound waves the vibration of sound in a medium sympathetic vibration resonance interference and the. They hit the drum and the vibrations. Mode of resonance in your tube. Students will answer 8c and 9 based on the information about the frequencies of tuning forks. Both the investigations were very different to each other and to conduct the experiment we had a 120Hz vibrator 2 stands with 2 rods 3 rod clamps 1 pulley a short rod with a string clamp a meter stick a sound wave apparatus 3 tuning forks with different frequencies and brass weights.

They are designed to emit a single frequency when struck properly. Tuning Forks Lab Investigation Problem. When held above a sound tube the wave will travel down the tube reflect off the water surface then return to the top. The smaller the container used the bigger the splash will be. Wavelength equals speed divided by frequency. The vibration causes sound.

This is very simple. Sound vibrations is the tuning fork activity. The water level is lowered and the first loud sound is heard when the air column is 90 cm long. Then find the value at 10 centigrade. Next Maeve took one of the tuning forks and hit it against the hard part of her palm and then hovered it about 2 cm above the PVC pipe. Find the difference in length Δ L between the two consecutive resonances to calculate the wavelength of the sound wave.

The smaller the container used the bigger the splash will be. When the column of air in the tube has an appropriate length. Have groups repeat the experiment with a different student striking the tuning fork and holding it against the table. We started with the 256 Hz tuning fork. When the tuning fork is vibrating nearby. Then students put the tuning fork in the cup of water.

Measure the length of the air column for each resonance from the top edge of the tube. Hold the tines near your ear and you will hear it clearly. So the frequency of resonance of a 1m air column is 3411 341Hz. The sound causes vibrations and the water will splash and ripple. The stronger the vibrations the louder the sound. At the Tuning Fork Station students hit the tuning forks on the side of the desk or cup.

Emma would lift the PVC pipe slowly out.

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