How does a sound change if its source moves towards you, passes, and then moves away from you?......Which electromagnetic wave interacts the most with matter? Why?.......what is the significance of each of these sounds 0dB 100dB 120dB 200dB....best answer too answer that sounds most accurate
2007-12-12 15:24:11 · 1 answers · asked by Jim J 1 in Science & Mathematics ➔ Physics
1. How does a sound change if its source moves towards you, passes, and then moves away from you?.
The speed of an acoustic wave propagating in a particular medium is constant. In general the speed v is a product of frequency f and wave length L.
v=f L
As a source of sound approaches relative to the observer the wavelength L shortens and the frequency increases. The inverse is true about a moving away source.
2.Which electromagnetic wave interacts the most with matter? Why?.
What do you mean by interacts?
3.What is the significance of each of these sounds 0dB 100dB 120dB 200dB.?
This a a pressure a sound applies in units of decibels or the power detected emanating from an acoustic source.
2007-12-15 02:59:33 · answer #1 · answered by Edward 7 · 0⤊ 0⤋