Mechanical Waves, Sound & the Electromagnetic Spectrum
Part II: Wave Speed (pg 323-324)
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Part II: Wave Speed (pg 323-324)
The speed of an object equals the ________________________ traveled divide by the _______________________. Calculate the speed of a car that travels 70 miles in one hour. Show your work. What is the equation for the speed of a wave? What are the units for wavelength (check out Math Skills pg 324)? ____________________________ What are the units for frequency (cycles per second)? ____________________________ What happens to the wave speed if you increase the frequency? The musical note A above middle C has a frequency of 440 Hz. If the speed of sound is known to be 350 m/s, what is the wavelength of this note? Show your work! One of the largest organ pipes is in the auditorium organ in the convention hall in Atlantic City, New Jersey. The pipe is 38.6 ft long and produces a sound with a wavelength of about 10.6 m. If the speed of sound in air is 346 m/s, what is the frequency of this sound Part III: The Behavior of Waves (pg 326-329) What is reflection? Give an example. What is refraction? Give an example. (pg 327 & 366) What is diffraction? Give an example. What is interference? Give an example. Label the types of interference in the pictures below 
Part IV: Sound & Hearing (332-335) 
The image to the right shows sound waves traveling from the girl’s mouth to the guy’s ear. Are sound waves longitudinal or transverse waves? Through which media do waves travel the fastest? Why is this? 
Through which media do waves travel the slowest? Why is this? Sound intensity levels are measured in units called decibels. The decibel scale is based on powers of? A 0 decibel sound can just barely be heard. A 20 decibel sound has __________ times more energy per second than a 0 decibel sound. Pitch is the frequency of a sound. High-frequency sounds have a ____________________ pitch and low –frequency sounds have a _____________________ pitch. What important applications is ultrasound used for? _____ When an automobile moves towards a listener, the sound of its horn seems relatively a. low pitched b. high pitched c. normal _____ When the automobile moves away from the listener, its horn seems a. low pitched b. high pitched c. normal _____ The changed pitch of the Doppler effect is due to changes in a. wave speed b. wave frequency True / False: A moving wave source does not affect the frequency of the wave encountered by the observer. True / False: A higher frequency results when a wave source moves towards an observer. Two fire trucks with sirens on speed towards and away from an observer as shown below. 
Which truck produces a higher than normal siren frequency? Which truck produces a lower than normal siren frequency? Label the parts of the ear 
Use the terms in the box to fill in the paragraph 
Something vibrates to produce a sound. Sound travels through _______________ to the ear. When the vibrations reach the eardrum they are transferred to the small _______________ called the hammer, anvil and stirrup. The bones pass the vibrations to the _______________ . This contains sense cells which change the vibrations to _______________ signals called impulses. The auditory nerve takes the _______________ to the brain. We hear the sound when the message reaches the _______________ . Directory: uploads uploads -> 587 Return function, r i(X) r i(0) r i(1) r i(2) r i(3) 1 0 2 4 6 Thermal Station, I 2 0 1 5 6 3 0 3 5 6 10 uploads -> Department of science and humanities department of mathematics part-a questions and answers uploads -> The Case Against the nypd’s Quota-Driven ‘Broken Windows’ Policing What Is It? uploads -> For want of a nail uploads -> Ownership Models There are two different types of ownership models uploads -> Police Militarization uploads -> City of rising star regular meting thursday, july 14, 2016 uploads -> Township of winfield uploads -> Stop Militarizing Law Enforcement Act of 2014 uploads -> The Black Panther Party’s Ten-Point Program What We Want Now! Download 419.33 Kb. Share with your friends:
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