Physics Lab Instructions PHYSICS Read and follow the steps to complete the investigation. Wavelength and Speed Online Lab Frequency and Wavelength In this part of this investigation, you will use the simulation to explore the relationship between frequency and wavelength. 1. When you open the simulation, you will see a string of beads. Before Manual making any adjustments, click the "Pause" button below the string of beads. This will keep them in place so that they don't move until you are Oscillate ready. Pulse 2. At the top left of the screen is a section that describes how the wave will Fixed End be produced. Select "Oscillate." Loose End 3. On the top right side of the screen is a section where you can select the No End type of end the wave has. Select "No End." Amplitude Frequency 0.75 cm 3.00 Hz Damping Tension Rulers None Lots Low High O Timer L Reference Line 4. The bar at the bottom has other variables that can be changed and some measurement tools that can be used. Select "Rulers" to have a horizontal and vertical ruler on the screen. Also move the slider under "Damping" to "None." 5. One of the variables that can be changed is frequency. In this section you will change the frequency and measure the wavelength. Before doing this, answer Question 1 on your assignment worksheet. 6. Use the slider to change the frequency to 3.00 Hz. Click "Play" and let the simulation run until the wave reaches the end of the string, then click "Pause." 7. Use the horizontal ruler to measure the wavelength. The wavelength is the length of one complete wave and is the distance from a point on one wave and the same point on the next cycle of the wave. The wavelength is most easily NEXT PAGEmeasured by finding the distance from one crest of a wave to the next crest. You can click on and drag the horizontal ruler as needed to make it easier to measure the wavelength. Record the frequency and the wavelength on the data table on Question 2 of your assignment worksheet. 8. The units on the ruler are in centimeters, and the units for wavelength are usually expressed in meters. To convert centimeters to meters, divide the number of centimeters by 100 and enter that on the data table on Question 2 of your assignment worksheet. 9. Click the gray "Restart" button located toward the top left side of the screen, then change the frequency to 2.50 Hz. Click "Play" and let the simulation run until the wave reaches the end of the string, then click on "Pause." 10. Measure the wavelength for this wave. Record the frequency and the wavelength (in cm and m) on the data table on Question 2 of your assignment worksheet. 11. Repeat Steps 9 and 10 for frequencies of 2.00 Hz and 1.50 Hz. 12. Compare the frequencies and wavelengths and answer Question 3 on your assignment worksheet. Speed of a Wave One way to determine the speed of a wave is to use the frequency and the wavelength. To see how this works, consider the units for frequency and wavelength. Frequency is measured in Hz, which is equal to 1 cycle/second; and wavelength is measured in meters. Speed is usually expressed in units of m/s. If the wavelength and the frequency are multiplied together, the units are m/s, which is the speed. . m = " Thus, this wave equation can be used to find the speed of a wave. V=1f 1. To use this method to find the speed of a wave, use the frequencies and wavelengths from the data table in Question 2. Transfer the frequency and wavelength in meters to the data table in Question 2 to the data table in Question 4 on your assignment worksheet. 2. Multiply the frequency and the wavelength for each set of data and enter the speed of the NEXT PAGEwave on the data table on Question 4 on your assignment worksheet. 3. Compare the speeds calculated using this method and answer Questions 5 and 6 on your assignment worksheet. Wave Speed in Different Media In this part of the investigation, you will determine if the medium of the wave affects the speed of a wave. The tension slider will be used to simulate different media for the wave. 1. The data table in Question 4 was filled out with the tension at high, so this data can be used as the first data point. Copy the data for a frequency of 1.50 Hz from the data table in Question 4 to the first row of the data table in Question 7 on your assignment worksheet. 2. Move the tension slider to the halfway point. Click the gray "Restart" Tension button located toward the top left side of the screen. Change the frequency to 1.50 Hz. Click "Play" and let the simulation run until the Low High wave reaches the end of the string, then click "Pause." Use the horizontal ruler to measure the wavelength and convert it to meters. Record the frequency and the wavelength in meters in the data table on Question 7 of your assignment worksheet. 3. Calculate the speed of the wave and enter that on the data table on Question 7 on your assignment worksheet. 4. Repeat Steps 2 and 3 with the tension on "Low." 5. Compare the speeds for the different media and answer Question 8 on your assignment worksheet. 6. Write a conclusion describing the relationship between frequency, wavelength, speed, and medium for a wave on Question 9 on your assignment worksheet.Name: Assignment: PHYSICS Wavelength and Speed Online Lab Part 1: Frequency and Wavelength 1. Make a prediction about how the wavelength will change as you decrease the frequency of a wave. 2. Data Table for Frequency and Wavelength of a Wave Frequency (Hz) Wavelength (cm) Wavelength (m) 3. What happens to the wavelength as the frequency decreases? Was your prediction in Ques- tion 1 correct? Use data to support your answer. NEXT PAGEPart 2: Speed of a Wave 4. Data Table for Frequency, Wavelength, and Speed of a Wave Frequency (Hz) Wavelength (m) Speed (m/s) 5. For many kinds of waves, the speed of the waves is roughly constant for a range of different frequencies. Explain how this is supported by your data. 6. Describe some possible sources of error in this part of the investigation. Part 3: Wave Speed in Different Media 7. Data Table for the Speed of a Wave in Different Media Tension Frequency (Hz) Wavelength (m) Speed (m/s) High Medium Low8. What happens to the speed of a wave as the medium of the wave changes? Use data to sup- port your answer. 9. Write a conclusion describing the relationship between the frequency, wavelength, speed, and medium for a wave