Physics Jeopardy Waves Wave Calc Sound Extra credit on quiz questions Q $100 Q $200 Q $300 Q $400 Q $500 Q $100 Q $200 Q $300 Q $400 Q $500 Final Jeopardy

$100 Waves What type of wave is this? 2 m 9m 3s

$100 Answer Waves Transverse wave

$200 Waves What is the amplitude of this wave? 2 m 9m 3s

$200 Answer Waves 1 m

$300 Waves What is the wavelength of this wave? 2 m 9m 3s

$300 Answer Waves 2m

$400 Waves The frequency of this wave is? 2 m 9m 3s

$400 Answer Waves 0.33 Hz

$500 Waves What does it mean for two waves to be completely out of phase?

$500 Answer Waves They will cancel each other out

$100 Question Waves While playing with a slinky you lay the slinky on the floor and pull a bunch of coils towards you. When you let go of the coils and watch the bunch of coils travel to the other end of the slinky, what type of wave does this demonstrate?

$100 Answer Waves A longitudinal wave

$200 Question Waves During a single period of a wave, how far does it travel?

$200 Answer Waves One wavelength

$300 Question Waves Where can you touch a standing wave on a rope without disturbing the wave?

$300 Answer Waves On a node

$400 Question Waves What direction will point E move as this wave progresses?

$400 Answer Waves Downward

$500 Question Waves I drop an elephant off a boat in the middle of the Atlantic ocean. Explain why, if energy is conserved, the wave most likely wont reach you in cape cod?

$500 Answer Waves The energy spreads out

$100 Question Wave Calc. The wave speed of this wave is _________. 3 m 1 m 0.5 s

$100 Answer Wave Calc. 6 m/s

$200 Question Wave Calc. If you double the frequency of a vibrating object, its period __________.

$200 Answer Wave Calc. halves

$300 Question Wave Calc. Katie pushes Ryan on a swing in an attempt knock Cameron over on the other side of the swing set. If the swing is 3m long, how long will it take Ryan to swing back and forth once?

$300 Answer Wave Calc. 3.47s

$400 Question Wave Calc. Radio amateurs are permitted to communicate on the 10 meter band. What frequency of radio waves corresponds to a wavelength of 10m if the speed of light is 3x10 8 m/s?

$400 Answer Wave Calc. 3x10 7 Hz

$500 Question Wave Calc. As an anchor is being hoisted out of the water, it hits the hull of a ship, causing the anchor to vibrate with a frequency of 150 Hz. If the speed of sound in sea water is 1520 m/s, how many wavelengths of sound will fit between the boat and the ocean bottom 395 m below?

$500 Answer Wave Calc wavelengths

$100 Question Sound A sound wave is what kind of wave?

$100 Answer Sound Longitudinal or compression

$200 Question Sound What is the resonant frequency of a 350 Hz tuning fork if it is struck on a 25 degree Celsius day?

$200 Answer Sound 350 Hz

$300 Question Sound How many times more intense is a 80 dB sound than a 60 dB sound?

$300 Answer Sound 100 times

$400 Question Sound Haley is going to drop a pie on your head from a high altitude. To stop you from getting pied, Jack tries to sabotage Haley by placing a buzzer in the pie. The buzzer creates a tone of about 19,500 Hz. Do you think you will get hit with the pie? Why?

$400 Answer Sound Yes, since the pie is traveling toward you, the frequency increases due to the Doppler Effect. A human can’t hear over 20,000 Hz and has trouble even with frequencies approaching that so most likely you wont hear it coming.

$500 Question Sound Two notes are sounding, one of which is 370 Hz. If a beat frequency of 5 Hz is heard, what is the other note’s Frequency?

$500 Answer Sound 365 Hz, or 375 Hz

$100 Question Other LOL

$100 Answer Other LOL

$200 Question Other LOL

$200 Answer Other LOL

$300 Question Other LOL

$300 Answer Other LOL

$400 Question Other LOL

$400 Answer Other LOL

$500 Question Other Just sad….

$500 Answer Other LOL

Final Jeopardy What does the fact that some starts look blue and some stars look red indicate about motion of the star… and why?

Final Jeopardy Answer Due to the Doppler Effect, starts moving away from us have lower frequencies so they appear red and stars moving toward us have higher frequencies so they look blue.