4. PHET waves intro

Name: Aileen Rodriguez PHET waves intro https://phet.colorado.edu/en/simulation/waves-intro Click on the above link. Start simulation. Choose Water Click Side View, (bottom left) Choose the multi wave. Set Frequency and Amplitude in the middle. Click the Graph. Click on the green dot on the faucet and start the water flowing. Observe the waves. Compare what you see with the water to the waves on the graphs. 1. Now increase the frequency. What happens with the number of waves? - Frequency increases, the wavelength gets shorter. What happens to the distance between waves (wavelength)? - As the frequency of a wave increases, the wavelength decreases. 2. Increase the amplitude. What happens with waves? - The higher the amplitude, the higher the energy. 3. Decrease the frequency, What happens with the number of waves? - As the frequency decreases, the wavelength gets longer. What happens to the distance between waves (wavelength)? - As the frequency of a wave decreases, the wavelength increases. 4. Decrease the Amplitude, What happens with the waves? - The amplitude decreases and the waves become slow. Now choose the Speaker (sound) the bottom. Set to side view and the multiple waves. Put Frequency and Amplitude in the middle (just like you did with the water) Choose Play Tone and Waves. 5. You can have your sound on - but don’t have it extremely loud. Push the green button for sound. What do you notice about the waves? - The waves have the same distance between each other. 6. What do you notice about the speaker? - It is moving back and forth as it emits sound waves 7. Now increase the frequency. How does the speaker movement change? - The speaker changed to faster. 8. What happens with the pitch of the sound? Gets higher. the number of waves? Increases. What happens to the distance between waves (wavelength)? Stays the same 9. Now decrease the frequency. How does the speaker movement change? Moves slow 10. What happens with the pitch of the sound? Gets lower. the number of waves? Decreases. What happens to the distance between waves (wavelength)? Increases. 11. Increase the amplitude. How does the speaker movement change? Moves slower 12. Does the pitch change? Stays the same. What happens to the volume? Increases. 13. Decrease the amplitude. How does the speaker movement change? Moves slower 14. Does the pitch change? Yes. What happens to the volume? The volume decreases. Turn off the Tone. Click on BOTH (for particles and waves) Move the Frequency and Amplitude sliders side to side (high to low) Watch the particles, especially the red dots. 15. Describe how the particles move wave energy.