Physics, 19.05.2021 08:50 turboslayer
QUESTION 4
In the diagram, a vehicle with a siren attached to its roof is travelling to the right. The siren
emits a continuous note of frequency 450 Hz. Upon listening to a recording on the tape
recorder, the siren appeared to be emitting 2 sounds of different frequencies, 464 Hz and
437 Hz.
towards and
away
Emitted sound
Tape Recorder
4.1 Name the phenomenon which would have led to the recording of the two
different notes.
(1)
4.2 State and very briefly describe one useful application of this phenomenon
(as it applies to sound or light).
(3)
4.3 Use the information in the text to determine the magnitude of the velocity
at which the vehicle was travelling.
Take the speed of sound to be 340 m. s.
(4)
4.4.
Explain (in terms of the wave fronts being produced) why the observed frequencies
are respectively higher and lower than the frequency of the source. (4)
Answers: 3
Physics, 22.06.2019 21:20, CM0
Abeverage can is made of 3004-h19 aluminum alloy (elastic modulus 69 gpa, tensile yield strength 285 mpa, density 2.72 g/cm^3). the dimensions on the can are approximated as a thin-walled cylinder with a height of 4.83 inches, diameter of 2.60 inches. empty the can has a mass of 14.2 g. determine: a. the wall thickness of the cylinder b. assuming a pinned-pinned condition what is the critical load? c. assuming a fixed-fixed condition what is the critical load?
Answers: 1
Physics, 22.06.2019 21:30, mxrvin4977
Ineed this now one scientist feels that the changes in global climatic patterns may be good for the health of the biosphere. another scientist feels that sharp changes in climatic patterns could result in the extinction of the biosphere. which of these is the most likely reason the two scientists gave conflicting opinions on the impact of changes in the global climatic pattern? they do not have enough knowledge on the topic. they did not discuss the issue among themselves. they believe conflicting opinion strengthens science. they study different areas of science and have different scientific focuses.
Answers: 1
QUESTION 4
In the diagram, a vehicle with a siren attached to its roof is travelling to the right....
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