S.P.A.C.E. LABORATORY NO.
3
SOUND WAVE
Name Rating:
Grade and Section Date:
A. S.P.A.C.E. Lab Objectives:
At the end of the laboratory study, I should be able to:
1. Investigate how frequency and amplitude affect the characteristics of the waves.
2. measure the speed of the wave.
3. compare to the accepted value of the speed of sound.
B. Materials:
The S.P.A.C.E. Lab will require the following:
PHET Lab: Wave Interference
(https://phet.colorado.edu/sims/html/wave-
interference/latest/wave-interference_en.html)
Scan the QR Code on the right or click Any device
where the lab may be access.
Wave Interference
C. Let’s do an e-lab!
Part 1: Sound as Mechanical Wave
1. Click from the home
page “Waves”
2. Set-up the simulation
by ticking the following
settings:
a)
b) Top View
c) Normal
d) Sound (as shown in
the red circle)
e) Play Tone “on”
f) Particles “on”
3. Click the green button at the speaker as shown in the blue circle. Observe the movement of the
white and red particles.
Data Analysis:
1. What happens to the movement of the white particles as disturbance is produce by the
speaker?
2. When the particles hit the wall on the right, what has been the movement of the white
particles?
3. Explain how this simulation prove that sound is a mechanical wave and a longitudinal
wave.
Part 2: Frequency and
Amplitude
1. Reset the simulation.
2. Set-up the simulation by
ticking the following settings:
a)
b) Top View
c) Normal
d) Sound (as shown in the
red circle)
e) Graph “on”
f) Play Tone “on”
g) Waves “on”
3. Click the green button at the speaker as shown in the blue circle. Move the frequency selector
to minimum, pause and use the tool to measure the wavelength of the sound produce in
cm, record this on the table below:
Frequency Wavelength
4. What relationship does frequency has with wavelength?
5. Move back the frequency selector to mid-range, then observe the sound as you move the
selector to minimum. What change in the sound has happened?
6. From minimum frequency selector, listen and observe the change in the property of sound as
you move the selector to maximum. What change in the sound has happened?
7. Move back the frequency selector to mid-range. Then move the amplitude selector to zero (0).
What change in the sound has happened?
8. Slowly increase the amplitude from zero to mid-range, observe the graph created and the
change in the property of sound. What change in the sound has happened? Screenshot, and
paste it below:
Screenshot Add Here!
9. From the mid-range slowly move the amplitude selector to maximum, observe the graph
created and the change in the property of sound. What change in the sound has happened?
Screenshot, and paste it below:
Screenshot Add Here!
Part 3: Speed of Sound
1. Reset the simulation.
2. Set-up the simulation by
ticking the following
settings:
a)
b) Top View
c) Slow
d) Sound (as shown in
the red circle)
e) Graph “on”
f) Play Tone “on”
g) Waves “on”
3. Drag the timer tool close to the green button of the speaker.
4. Click on the timer “play” button. After 5 seconds click on the speaker’s green button.
Stop the timer when the wave pulse reach the 500 cm distance
5. Subtract the time by the 5 s allowance time, to determine the length of time from
which the sound has travel. Record the time in s (1 ms=1.00 x 10−3 s .)
6. Calculate the speed of sound from the equation below, show your solution below:
d
v=
t
7. Calculate for the %E, using the speed of sound at 0 ° C , 332m/ s as the true value.
v true value−v exp value
%E= x 100 %
v true value
Analysis:
Velocity Calculation: % Error Calculation:
d v true value−v exp value
v= %E= x 100 %
t v true value
Guide Questions:
1. How are the properties of sound affected by the change in frequency and amplitude?
2. How does your measurement compare to the accepted value of the speed of sound or light?
How can you explain the discrepancies between your calculated value and the accepted value?
D. Conculsion:
SCORING RUBRIC:
The experiment shall be rated based on the criteria below:
5 – Excellent; 4 – Very Good; 3 – Good; 2 – Poor; 1- Very Poor
CRITERIA RATING
1. Data is accurately and precisely presented.
2. Answers to the questions are relevant and accurate.
3. Analysis shows in-depth understanding of the principle/theory and or concept.
4. Conclusion is comprehensive and clearly related to the objective/s stated.
5. Experiment paper is neatly submitted.
TOTAL /25
