§5.4 + §5.5

• Natuurkunde / Scheikunde
• Middelbare school
• havo, vwo
• Leerjaar 1

Before you do the questions:

1. You are setup in a group through zoom.
2. One of you shares your screen with the presentation on it.
3. Set lessonup to presentation mode.
4. One of you writes down the answers you come to in a word document (if this isn't possible, aks mr. Brands for help)
5. Now you're ready, start the questions

Recap last week.

How many waves do you count in each image?

Image 1

Image 2

One square is 3 cm long, what is the wave length of the waves in each image?

Image 1

Image 2

One square is 3 cm, what is the amplitude of the wave below?

In a soundwave the air (or another medium) actually doesn't go up and down. 

What do the ups and down in the visual depiction of a wave indicate about the air?

Of these two sound waves, which will produce a louder sound? Explain.

Image 1

Image 2

What is the amplitude of a wave? how does it influcece the sound a soundwave produces? 

What is wavelength of a wave?

Request mr. Brands to join to go over the questions you have answered so far. 

Already start with the next questions until he joins.

§5.5 Pitch and frequency

Which of these two audio samples has the highest pitch?

Audio sample A

Audio sample B

Which of thes two sound waves has a hihger frequency?

Wave 1

Wave 2

Which wave would produce which sound? match them.

Wave 1

wave 2

Audio sample A

Audio sample B

What is the relationship between pitch and frequency?

• What is frequency? What is the unit of frequency? Explain in your own words. 

• What is the difference between amplitude and frequency?

• How does the amplitude of a soundwave influence the sound it makes? How does the frequency of a soundwave infuence the sound it makes?

Request mr. Brands to join to go over the questions you have answered so far. 

Already start with the next questions until he joins.

Calculations

See the two images below. in both images 8 milliseconds go by.

a) How many waves are there in one second in each image?

b) what is the frequency of the waves in each image?

Image 1

Image 2

See the images below. in both images 8 milliseconds go by.

What is the frequency of this wave? use the formula 

f=​T​​1​​

A speaker produces a sound wave of 18 Hz. 

a) Would you hear any sound from it? Explain.

b) Would an elephant hear any sound from it? Explain.

c) You decide to let the speaker play a higher frequency. How high could you go so that we can still hear it?

Done?

Start with § 5.6