H8.2

Chapter 8.2 
Take out your supplies!
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Slide 1: Tekstslide
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Chapter 8.2 
Take out your supplies!

Slide 1 - Tekstslide

Goals & Lesson plan

Goals:
  • By analysing a soundwave in a graph you will be able to point out the following: wavelength, amplitude, period, frequency, tone/pitch and volume.
  • You will be able to calculate the frequency by using a formula.

Lesson plan:
  • Repetition 
  • Homework

Slide 2 - Tekstslide

Howmany cycles (wavelengths) can you see?
timer
2:00
A
6
B
3

Slide 3 - Quizvraag

If one cycle(wavelength) is 1 millisecond, what is the frequency?

timer
2:00

Slide 4 - Open vraag

If one cycle(wavelength) is 500 milliseconds?
timer
2:00

Slide 5 - Open vraag

Calculate the value of the vibration period (T)?
timer
2:00

Slide 6 - Open vraag

Calculate the frequentcy.
timer
2:00

Slide 7 - Open vraag

Calculate the frequentcy of this tuningfork.
timer
2:00

Slide 8 - Open vraag

Which graph has the largest amplitude?
Graph 1
Graph 2
timer
2:00
A
Graph 1
B
Graph 2
C
The aplitudes are equal.
D
You can't determine this with the given information.

Slide 9 - Quizvraag


The timebase of this graph is 0,005 s/div. Calculate the frequentcy.
timer
2:00
A
20 Hz
B
50 Hz
C
0,000020 Hz
D
50000 Hz

Slide 10 - Quizvraag

Which letter indicates the aplitude?
timer
2:00
A
a
B
b
C
c
D
d

Slide 11 - Quizvraag


Calculate the frequentcy. The vibration piriod has the following value: 
T= 0.02 seconds

timer
2:00
A
20 Hz
B
50 Hz
C
0,000020 Hz
D
50000 Hz

Slide 12 - Quizvraag

An object makes 25 cycles in 2,0 minutes. Which answer has the correct calculation?
timer
2:00
A
f = 120 / 25 = 4,8 Hz
B
f = 25 / 120 = 0,21 Hz
C
f = 2,0 / 25 = 0,08 Hz
D
f = 25 / 2,0 = 13 Hz

Slide 13 - Quizvraag

Calculate the the vibration piriod.
timer
2:00
A
4 ms
B
6 ms
C
8 ms
D
10 ms

Slide 14 - Quizvraag

Which question(s) did you have some difficulty with and why?

Slide 15 - Open vraag

Homework


Make:
  • Chapter 8.2: 1 t/m 10
  • Bonus 11

Slide 16 - Tekstslide