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Why is the answer D? Tbr doesn't do a good explanation of it.
Tbr problem 37 physics.
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Why is the answer D? Tbr doesn't do a good explanation of it.
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Wave speed is unique to the medium, so only frequency and wavelength change within a single medium. In the case of sound, velocity of sound depends on things like density and bulk modulus of medium.
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Or, people talk about the "speed of sound" so it is probably a constant.
Or, have you ever been to a concert and sat in the last row? If the answer was B, then the different frequencies would arrive at much different times, and the sound would be really distorted by the time it got to you.
Or, have you ever been to a concert and sat in the last row? If the answer was B, then the different frequencies would arrive at much different times, and the sound would be really distorted by the time it got to you.
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As far as the question goes:
A: There is no reason sound would follow that sort of pattern in air. When a source sends multiple frequencies at the same time, they all travel with the same speed (unless they change medium).
B: If this were true, you'd hear the low frequencies as much as ten times sooner than the high frequencies, which would drastically distort the sound.
C: If this were true, then you wouldn't hear midrange sounds, because they wouldn't travel. There is no reason to believe this.
D: This must be true, because as sazerac pointed out, no matter where you sit when watching a concert or performance, the music (a mixture of many frequencies) sounds the same (no distortion). All of the waves must be arriving at the same time no matter where you sit, so the waves must travel from the source at the same speed.
@sazerac, that is almost verbatim of the answer explanation in the BR course (in so Cal at least). Did you take the class?
A: There is no reason sound would follow that sort of pattern in air. When a source sends multiple frequencies at the same time, they all travel with the same speed (unless they change medium).
B: If this were true, you'd hear the low frequencies as much as ten times sooner than the high frequencies, which would drastically distort the sound.
C: If this were true, then you wouldn't hear midrange sounds, because they wouldn't travel. There is no reason to believe this.
D: This must be true, because as sazerac pointed out, no matter where you sit when watching a concert or performance, the music (a mixture of many frequencies) sounds the same (no distortion). All of the waves must be arriving at the same time no matter where you sit, so the waves must travel from the source at the same speed.
@sazerac, that is almost verbatim of the answer explanation in the BR course (in so Cal at least). Did you take the class?
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Lol no. I bought your 2 book series on bio, back in 2011, and got a perfect 15 in bio. Maybe I should have used more of your products
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"The data convincingly show that wave frequency does not affect wave speed. An increase in wave frequency caused a decrease in wavelength while the wave speed remained constant."
http://www.physicsclassroom.com/class/waves/Lesson-2/The-Speed-of-a-Wave
Wave speed is a constant which pertains to the medium, as previously states. Therefore, you could imagine that wave speed is not relative to wave frequency, which is what graph "D" represents. Not to mention none of the other graphs make a lick of sense AT ALL. This question should be a freebie.
http://www.physicsclassroom.com/class/waves/Lesson-2/The-Speed-of-a-Wave
Wave speed is a constant which pertains to the medium, as previously states. Therefore, you could imagine that wave speed is not relative to wave frequency, which is what graph "D" represents. Not to mention none of the other graphs make a lick of sense AT ALL. This question should be a freebie.
