Question
A sound of 7 kHz frequency is well within the normal hearing range of most people.
True.
False. <<
2. Sound is a transverse compression wave.
True.
False.<<
3. The decibel level of a sound can have a negative value.
True.<<
False.
4. The Doppler effect occurs only for compression waves, such as sound.
True.
False. <<
5. If one sound source has an intensity 30 dB above another, it has a power per unit area 1000 times stronger.
True. <<
False.
6. An observer moving toward a source at a velocity v hears the same frequency as if the observer were standing still and the source were moving towards it at the same velocity.
True.<<
False.
7. The loudness of a sound as perceived by the ear depends only on its intensity.
True. <<
False.
8. When the temperature goes up, the fundamental frequency of an organ pipe will also go up.
True. <<
False.
True.
False. <<
2. Sound is a transverse compression wave.
True.
False.<<
3. The decibel level of a sound can have a negative value.
True.<<
False.
4. The Doppler effect occurs only for compression waves, such as sound.
True.
False. <<
5. If one sound source has an intensity 30 dB above another, it has a power per unit area 1000 times stronger.
True. <<
False.
6. An observer moving toward a source at a velocity v hears the same frequency as if the observer were standing still and the source were moving towards it at the same velocity.
True.<<
False.
7. The loudness of a sound as perceived by the ear depends only on its intensity.
True. <<
False.
8. When the temperature goes up, the fundamental frequency of an organ pipe will also go up.
True. <<
False.
Answers
Damon
8. When the temperature goes up, the fundamental frequency of an organ pipe will also go up.
Play with this:
http://hyperphysics.phy-astr.gsu.edu/hbase/waves/opecol.html
Chelsea
were the others correct?
Chelsea
When I did it, I saw that 8 was true, is that right?
Damon
I put in 0.5 meter length, open both ends
at 20 deg --> 344 Hz
at 40 deg --->356 Hz
so yes, true :)
I agreed with others.
at 20 deg --> 344 Hz
at 40 deg --->356 Hz
so yes, true :)
I agreed with others.