Waves

posted May 16, 2016, 1:31 PM by Tony Farley   [ updated May 18, 2016, 1:10 PM ]

Create a Google Doc to answer all of the following questions.

WAVES CARRY ENERGY FROM ONE PLACE TO ANOTHER

You should know that waves carry energy from one place to another.  Read this page down to the part where it talks about the boat and answer the following questions in your notes and title this section:

  1. List the three examples used to explain how waves carry energy through solids, liquids, and gasses. Find images of each.
  2. For a boat, how do you know energy is being transferred when waves pass? Find an image that illustrates this.

You should know how to identify transverse and longitudinal waves in mechanical media, such as springs and ropes, water, and on the earth (seismic waves).

Title this section

TRANSVERSE VS. LONGITUDINAL WAVES

  1. Go to this website to learn about transverse and longitudinal waves.  Find an image that shows each type of wave and describe each kind of wave.
  2. Using the previous page linked here, press the arrows on the bottom right of the simulation to oscillate the medium (green balls) up and down.  Screenshot this motion and label it as transverse or longitudinal.
  3. Click thebutton to make the medium move back and forth in the direction the waves travel. Screenshot this motion and label it as transverse or longitudinal. Describe why it's transverse or longitudinal
  4. Click the up and down motion arrow, screenshot this motion and label it as transverse or longitudinal. Describe why it's transverse or longitudinal.
You should know what the terms Amplitude, Wavelength, and Frequency are and be able to identify them in a wave. Using the same page as beforego to the bottom of the page and answer the following:

Title this section:
AMPLITUDE, FREQUENCY, AND WAVELENGTH
  1. Find an image that labels wavelength, crest, amplitude, trough, and equilibrium position or find an image for each.
  2. Click the Amplitude link at the bottom of this page and explain what amplitude is.  Screenshot the pendulum that you create and write its amplitude under the picture.
  3. Click the Wavelength link and explain what wavelength is.  Measure the wavelength of the wave, check your answer, and screenshot the wave with the ruler, your answer, and that you got it right.
  4. Click the Frequency link. This link is actually about The Period, which is the time for one oscillation.  Create a pendulum with a 6 second period. Screenshot this pendulum and describe under the image what you did to make the period 6 seconds.
  5. How is frequency related to period?
  6. If the period of a pendulum is 2 seconds, what is the frequency in Hz?


WAVE INTERFERENCE

Two waves passing each other will blend together and interfere with each other.  When high points join, the wave becomes even bigger.  When two low points interfere, the wave trough becomes even lower.  When a peak meets a trough, the two waves combine to make no wave at all.

To understand interference, go to this website.

Fill in the blanks of the following sentences and put them in your notes along with a screenshot showing the situation:

1. When two wave peaks meet, the resulting peak is __________________ compared to each individual peak. Include a screenshot

2. Constructive interference is ___________________________________. Include a screenshot

3. When two waves interfere to create no wave at all, this is called _________________________.  Include a screenshot.

4. Explain how standing waves are created. Include a screenshot.

Save this document. You will add to it next time.

Sound Waves

Take the Superpowers Survey here (only 5 questions).


For all of the following, do not use examples or images from the slideshows. Find your own examples and images.

1. Explain what sound waves are, how they are created, and how you hear them. Include pictures for each.
2. Explain what pitch and frequency is.
3. Find an example of high frequency sound and an example of low frequency sound. Include an image for both.
4. Explain how loudness is measured, what it is, and find an example of a very loud thing and a very quiet thing. Include images for each and how many decibels it is.

Go to Lesson 1 (sound waves)

Find an image and explain what each of the following are. Do not post any images from the slideshows. Find a different image that shows the concept.
Speed
Frequency
Wavelength
Longitudinal
Transverse


Fill out this form to turn your work in.

Comments