Do Now (4/23/12):

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Do Now (4/23/12)

• Make a list of concepts you need to know for your
  test tomorrow

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Ms. Timsons

• Review to Conquer Physics

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Rules of the Game

• There will be tribes, as divided by the teacher
• For each problem which appears on the slide, the
  tribe will be able to work together to vote on
  one answer given only the time which will be
  written on the slide.
• Tribes cast their answer using their voting cards
  only in the time allowed.
• Each team with a correct answer is allowed to
  cast one vote to remove another tribe from the
  island. The teacher will have each tribe cast
  their vote simultaneously by writing the color of
  the tribe they are voting for on their white
  board. The teacher will then remove tribes from
  the island.
• The teacher will track which tribes are in and
  which tribes are out of the game with signs on
  the board.
• If a tribe is voted out, they can reenter the
  game by answering the next question correctly to
  reenter. They will NOT receive a vote for that
  question but must wait until the next question.
• Winning tribes will be those still on the island
  at the end of the game.
• The teacher will be the final judge of any
  conflicts or confusions and remember, be
  respectful and be honest!

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• 1. If the particles of the medium are vibrating
  to and fro in the same direction of energy
  transport, then the wave is a ____ wave.
• longitudinal
• B. sound
• C. standing
• D. transverse
• 15 seconds

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• 2. A single disturbance that moves from point to
  point through a medium is called a ___.
• period
• B. periodic wave
• C. wavelength
• D. Pulse
• 10 seconds

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• 3. Suppose that sound waves emanate from a razor
  at a rate of 50 cycles per second and spread out
  at 340 m/s. The frequency is
• 6.8 Hz
• B. 25 Hz
• C. 50 Hz
• D. 200 Hz
• 25 seconds

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• 4. A radio station broadcasts at a frequency of
  660 kHz. What is the wavelength of these waves?
  The speed of radio wave is 3 x 108 m/s.
• 454.55 m
• B. 454545.55 m
• C. 2.2 x 10-6 m
• D. 0.002 m
• 40 seconds

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• 5. How fast is the sound moving in air if the air
  temperature is 40ºC?
• 13260 m/s
• B. 355.5 m/s
• C. 371.5 m/s
• D. 332.1 m/s
• 40 seconds

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• 6. Which property of sound is determined by the
  sounds amplitude?
• A. pitch
• B. loudness
• C. overtones
• D. resonance
• 15 seconds

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• 9. Sound wave does not travel through _____.
• air
• B. water
• C. a vacuum
• D. iron
• 20 seconds

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• 10. A sound wave of amplitude A interferes with
  another sound wave whose frequency is different
  but whose amplitude is also A. The resulting wave
  _____.
• has an amplitude of 2A
• varies in amplitude between 0 and A
• varies in amplitude between A and 2A
• varies in amplitude between 0 and 2A
• 30 seconds

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• 11. Maximum displacement of a wave from the rest
  or equilibrium position is called the ______ .
• wavelength
• B) frequency
• C) overtone
• D) Amplitude
• 15 seconds

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• 13. A wave in which the displacement of the
  medium is perpendicular to the direction of
  propagation is ______.
• a crest
• B) longitudinal
• C) rarefaction
• D) transverse
• 10 seconds

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• 14. The number of waves that pass a point in a
  unit period of time is ________ .
• amplitude
• B) frequency
• C) speed
• D) wavelength
• 10 seconds

15

• 15. Longitudinal waves are generated in a coil
  spring with a frequency of 10 hz. If they travel
  at 40 m/s, what is their wavelength?
• 0.25 m
• B) 4 m
• C) 30 m
• D) 400 m
• 40 seconds

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• 16. If a sound wave speeds up when it enters a
  new medium, the wavelength _____ .
• increases
• B) decreases
• C) stays the same
• 45 seconds

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• 17. The sound from a tuning fork resonates in a
  closed tube 18.0 cm long and 5.00 cm in diameter.
  At the time of the experiment the speed of sound
  is 360 m/s. (A closed tube is closed at one end.)
  What is the wavelength of the sound waves? (You
  must include consideration of the tube diameter.
  You may refer to the formula in your lab)
• 72.0 cm
• B) 73.6 cm
• C) 80.0 cm
• D) 160.0 cm
• E) 144.0 cm
• 55 seconds

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• 18. The sound from a tuning fork resonates in a
  closed tube 18.0 cm long and 5.00 cm in diameter.
  At the time of the experiment the speed of sound
  is 360 m/s. (A closed tube is closed at one end.)
• The frequency of the tuning fork is ________.
• 4.5 Hz
• B) 5.0 Hz
• C) 50 Hz
• D) 225 Hz
• E) 450 Hz
• 55 seconds

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• 19. The sound from a tuning fork resonates in a
  closed tube 18.0 cm long and 5.00 cm in diameter.
  At the time of the experiment the speed of sound
  is 360 m/s. (A closed tube is closed at one end.)
• The next tube length at which resonance can occur
  with this tuning fork is ________.
• 28 cm
• B) 36 cm
• C) 40 cm
• D) 58 cm
• E) 98 cm
• 55 seconds

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Congratulations!Good luck tomorrow!I know you
can conquer your test ?
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• 7. A pure musical tone causes a thin wooden panel
  to vibrate. This is an example of _____.
• an overtone
• B. harmonics
• C. interference
• D. resonance
• 20 seconds

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• 8. In which medium will sound travel the fastest?
  
• air
• B. water
• C. a vacuum
• D. iron
• 15 seconds

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• 12. Resonance can occur when the natural ______
  of two objects are the same.
• amplitudes
• B) frequencies
• C) velocities
• D) Mass
• 20 seconds