1. 5/1/17
5/1 Transverse Waves
TB p. 495 Part B #7-15
5/2 Compressional Waves TB p. 497 Part C
TB p CN
5/3 Compressional Waves TB p CN
HW: TB p. 502 #1-3
5/4 Wave Notes / TB p. 504 Essential Questions
5/5 Test- Roller Coaster Physics/ Waves

2. 2nd Front
Windows

3. 3rd Front
Windows

4. 7th Front
Windows

5. Date: 5/1 Objective: I can investigate the motion of waves and calculate the speed of a wave pulse.
Bell Ringer: Momentum – Passage 1
Concern over long-term neurocognitive effects of concussion related injuries have prompted numerous studies of head impacts in football and effectiveness of protective helmets. Researchers are concerned about the damaging effect of high accelerations and large forces.
Study 3: In a study an entire high school football team was fitted with accelerometer-equipped helmets during both practice and games for an entire season. Researchers investigated both linear and rotational accelerations by player position and impact location for both practices and games. Results are summarized in Table 6.
In Study 3, the most damaging collisions are those which have the smallest:
A. Head jerk
B. Force
C. Impulse
D. Time duration

6. Date: 4/7 Objective: I can investigate the motion of waves and calculate the speed of a wave pulse..
Bell Ringer: Momentum – Passage 1
Concern over long-term neurocognitive effects of concussion related injuries have prompted numerous studies of head impacts in football and effectiveness of protective helmets. Researchers are concerned about the damaging effect of high accelerations and large forces.
Study 3: In a study an entire high school football team was fitted with accelerometer-equipped helmets during both practice and games for an entire season. Researchers investigated both linear and rotational accelerations by player position and impact location for both practices and games. Results are summarized in Table 6.
Which of he following conclusions are
supported by data presented in Passage 1?
Collisions occurring in games are
less dangerous than those occurring in practice.
Collisions to the top of the helmet
are likely to be most dangerous.
Lineman encounter the most damaging collisions.
Collisions are less damaging when
wearing a helmet.

7. Date: 5/1 Objective: I can investigate the motion of waves and calculate the speed of a wave pulse. As a class complete #7-10 TB p. 495 Title: 5/1 TB p.495

8. Date: 1/2/13 Objective: I can investigate the relationship among wave speed, wavelength, and frequency. Waves TB p # 11-13a Class activity

9. Date: 5/2 Objective: I can understand the terminology used to describe waves
Bell Ringer: Finish the statement
A transverse pulse is one in which the motion of the wave is perpendicular to…..
As the amplitude of the transverse pulse on a spring increases, its speed…..
As the frequency of a standing wave increases, the wavelength…..

10. Date: 5/2 Objective: I can understand the terminology use to describe waves Waves Definitions On a whole page in your notebook create three columns down the page with the following headings
Term
What you think it means
New information

11. Date: 5/1 Objective: I can investigate the motion of waves and calculate the speed of a wave pulse. Write these terms with space between
Term
What you think it means
New information
Wave
Medium
Periodic
Crest
Trough
amplitude

12. Date: 5/1 Objective: I can investigate the motion of waves and calculate the speed of a wave pulse.
Term
What you think it means
New information
Wavelength
Frequency
Period
Transverse
Wave
Longitudinal
Standing

13. Date: 5/1 Objective: I can investigate the motion of waves and calculate the speed of a wave pulse.
Get a textbook
Independently read TB p and take CN
Title: TB p. 498 CN

14. Date: 5/3 Objective: I can investigate longitudinal waves Bell Ringer: Draw a transverse wave and label the follow terms: crest, trough, amplitude, wavelength

15. Date: 5/3 Objective: I can investigate longitudinal waves As a class complete Part C on TB pp. 497 Title: 5/3 TB 497 Part C

16. Date: 5/3 Objective: I can investigate longitudinal waves With your shoulder partner complete TB p. 504 Essential Questions in your NB Title: 5/3 TB p. 504

17. Date: 5/3 Objective: I can investigate longitudinal waves With your group complete Part C on TB pp. 497 Person #1 and #2 to conduct experiment Person #3 is the timer Person #4 reads directions and record data

18. Date: 5/3 Objective: I can investigate the motion of waves and calculate the speed of a wave pulse. Wave video

19. Exit slip
Independently answer the question Does the speed of the wave depend on the amplitude of the wave? Provide evidence from your investigation to justify your answer

20. Date: 5/3 Objective: I can investigate longitudinal waves Bell Ringer: Draw a transverse wave and label the follow terms: crest, trough, amplitude, wavelength

21. Date: 5/4 Objective: I can measure the wavelength, amplitude and frequency of a wave.
Draw a periodic transverse wave with an amplitude of .04m and a wavelength of
0.18m on a graph like the one below.

22. Date: 5/5 Objective: I can measure the wavelength, amplitude and frequency of a wave.
Draw a periodic transverse wave with an amplitude of .02m and a wavelength of
0.10m on a graph like the one below.

23. Date: 5/5 Objective: I can measure the wavelength, amplitude and frequency of a wave.
Bell Ringer :
#2 In the string activity you performed, what are two ways you could make a higher pitched sound?

24. Date: 5/4 Objective: I can measure the wavelength, amplitude and frequency of a wave.
With your shoulder partner complete the worksheet “Physics: Period, Frequency, wavelength and Amplitude

25. Date: Objective: I can work with my shoulder partner and group to review for my final exam.
Bell Ringer:
How many hours are
between high tide on
Tuesday and high tide
on Wednesday?

26. Date: Objective: I can investigate the relationship among wave speed, wavelength, and frequency.
Bell Ringer:
1.Energy is measured in the same units as:
work. b. momentum. c. power. d. force.
A girl lifts a 8N ball a distance of 2m in 4 seconds. What is the power the girl has supplied to lift the ball?
a. 2 watts b. 3watts c. 4 watts d. 16 watts

27. Date: Objective: I can investigate the relationship among wave speed, wavelength, and frequency.
Get a textbook
TB p. 495 #13-15
Title: TB p. 495

28. Date: Objective: I can investigate the relationship among wave speed, wavelength, and frequency.
Bell ringer: (3rd Q Exam review)
In the roller coaster project your team calculated the velocity of your roller coaster at the bottom of the first hill. Calculate the velocity of a 3700 kg roller coaster at the bottom of a 18m tall hill.
2. Two bodies attract one another with a gravitational force of 20N. What will be the force of attraction if the mass of each body is tripled?

29. Date: Objective: I can investigate the relationship among wave speed, wavelength, and frequency.
Bell Ringer: A boy has .15-kilogram ball on a string. Above his head, he swings the ball in a horizontal circle with a radius of 1.2 meters at 2.3 m/s. The diagram below is a top view of the situation.
1. What is the magnitude of the
centripetal force acting on the ball?
2. When the ball reaches point R,
where is the centripetal acceleration
of the ball directed?

30. Wave Parameters Wavelength (l) length or size of one oscillation
Amplitude (A) strength of disturbance (intensity)
Frequency (f) repetition / how often they occur per
second

31. Date: Objective: I can investigate the relationship among wave speed, wavelength, and frequency.
Get a textbook
TB p. 497 Part C
Title: TB p. 497 Part C
With your group complete Part C on TB pp. 497
Person #1 and #2 to conduct experiment
Person #3 is the timer
Person #4 reads directions and record data

32. Date: Objective: I can investigate the motion of waves and calculate the speed of a wave pulse. With your group complete Part C on TB pp. 497 Person #1 and #2 to conduct experiment Person #3 is the timer Person #4 reads directions and record data

33. Date: 1/2/13 Objective: I can investigate the relationship among wave speed, wavelength, and frequency. Waves TB p # 11-13a Class activity

34. Date: 4/15 Objective: As a class work together to make a wave machine
The class will work together to create a wave machine like the one shown in the video. Mr. Stoll will not be assisting you. If you complete the wave machine and every student participates, the class will be awarded extra credit points towards your midterm grade. If you do not succeed…… you get nothing. You have 25 minutes after watching the video.

35. Date: Objective: As a class work together to make a wave machine
Video

36. Date: Objective: As a class work together to make a wave machine
You will need one project coordinator
One person for stand set up
One person to hand out supplies
Two people to measure and mark the duct tape
Every student gets 1 skewer stick and 2 gummi bears.
Every student puts gummi bears on their skewer and places the completed skewer on the duct tape.
Use the physics stands to hold the tape.
You have just enough supplies for your class. Don’t eat the bears, or you will not complete your task!
25 Minutes

37. The Nature of Waves Wave is a traveling disturbance.
Wave carries energy from place to place.

38. Types of waves There are two basic types of waves:
Transverse and longitudinal waves.

39. Transverse waves

40. Transverse waves
A transverse wave is one in which the disturbance is perpendicular to the direction of travel of the wave.
Examples: Light wave, waves on a guitar string.

41. Longitudinal Waves

42. Longitudinal Waves
Longitudinal wave is one in which the disturbance is parallel to the line of travel of the wave.
Example: Sound wave in air is a longitudinal wave.

43. Types of Waves Longitudinal wave Transverse Wave
oscillations are in the
direction of motion
(parallel to the motion)
Transverse Wave
oscillations are perpendicular
to the direction of
Motion

44. Physical Examples Longitudinal wave Transverse Wave sound waves
earthquake P-waves
Transverse Wave
water waves
earthquake S-waves
light waves

45. Water Waves
Water waves are partly transverse and longitudinal.

46. Wave Parameters Wavelength (l) length or size of one oscillation
Amplitude (A) strength of disturbance (intensity)
Frequency (f) repetition / how often they occur per
second

47.  Periodic Waves
Periodic waves are waves that repeat.

48. Amplitude, Wavelength, and Period
The amplitude, A is the maximum disturbance.
The wavelength, λ  is the horizontal length of one cycle of the wave.
The period, T is the time required for one complete up/down cycle of the wave.

49. Wave Properties Waves are oscillations and they transport energy.
The energy of a wave is proportional to its frequency.
Fast oscillation = high frequency = high energy
Slow oscillation = low frequency = low energy
The amplitude is a measure of the wave intensity.
SOUND: amplitude corresponds to loudness
LIGHT: amplitude corresponds to brightness

50. What is the Wave length?
Measure from any identical two successive points
(nm) 5 10 15 20 25 30 35 40

51. What is the Wave length?
Measure from any identical two successive points
(nm) 5 10 15 20 25 30 35 40
30nm – 10nm = 20nm

52. What is the Wave length?
Measure from any identical two successive points
There are 4 complete oscillations depicted here
ONE WAVE = 1 COMPLETE OSCILLATION
(nm) 5 10 15 20 25 30 35 40
22.5nm - 2.5nm = 20nm

53. Frequency
Frequency is the number of waves per unit time.

54. Frequency
Frequency = number of WAVES passing a stationary point per second (Hertz)

55. Frequency and Period
Frequency (f) = number of oscillations passing by per second
Period (T) = length of time for one oscillation
T = 1/f f = 1/T
If a source is oscillating with a period of 0.1 seconds,
what is the frequency?

56. Wave Speed Wave speed depends on the wavelength and frequency.
wave speed v = l f
Which animal can hear a shorter wavelength?
Cats (70,000 Hertz) or Bats (120,000 Hertz)
l = v/f

57. If a source oscillates every 5 seconds, its period is
f = 1/(0.1) = 10 Hz
It will complete 10 oscillations in one second. (10 Hz)
If a source oscillates every 5 seconds, its period is
5 seconds, and then the frequency is…????

58. f = 1/5 = 0.2 Hz.

59. Wave Speed

60. Wave Speed

61. Wave Speed v = l f Which animal can hear a shorter wavelength?
Cats (70,000 Hertz) or Bats (120,000 Hertz)
l = v/f
Higher frequency = shorter wavelength
Lower frequency = longer wavelength

62. Doppler Effect
Change in frequency of a wave due to relative motion between source and observer.
A sound wave frequency change is noticed as a change in pitch.

63. Radio Waves FM vs AM: What's the difference?
AM: The amplitude of the signal is varied to incorporate the sound information. Frequencies are in kHz.
FM: The frequency of the carrier signal is varied to incorporate the sound information. Frequencies are in MHz.

64. FM vs AM Advantages and Disadvantages
FM signals are not affected by static.
With an FM broadcast, slight changes in amplitude don't matter -- since the audio signal is conveyed through changes in frequency, the FM receiver can just ignore changes in amplitude.
AM carrier waves have much longer wavelengths than FM carrier waves, and as a result, they can bend around obstacles like mountains and buildings better than FM waves and can travel greater distances before the signal fades.

65. Doppler Effect for Light Waves
Change in frequency of a wave due to relative motion between source and observer.
c = l f speed of light = wavelength x frequency
c = 3 x 108 m/s
E = hf = hc/l energy of a light wave, a photon
of frequency (f) or wavelength (l)
h = planck’s constant 6.63 x J-sec
A light wave change in frequency is noticed as a change
in “color”.

66. Constructive Interference
Waves combine without any phase difference
When they oscillate together (“in phase”)

67. Wave Addition
Amplitude ~ Intensity

68. Destructive Interference
Waves combine differing by multiples of 1/2 wavelength
They oscillate “out-of-phase”

69. Wave Subtraction

70. Wave Properties Amplitude:
Size of wave (perpendicular to direction of propagation)
Proportional to Intensity(Sound loudness, Light brightness)
Wavelength:
l Size of wave (in the direction of propagation)
Frequency:
Number of waves passing a fixed position per second
f (cycles/second, Hertz)
Wave Speed: v = l f
Frequency increases Frequency decreases
Energy increases Energy decreases
Wavelength decreases Wavelength increases