Physics, 15.11.2019 06:31 ayeofaygo5168
1) when sound (or any wave) is incident on a barrier where the nature of the medium changes (e. g. air to water) what generally happens?
a. all the energy is reflected
b. the sound is always completely absorbed
c. all the energy is transmitted
d. energy is transmitted and reflected
2) sound waves carry energy expressed as intensity i=(power/area) averaged over time. how does intensity depend on the amplitude of the pressure oscillations, p0?
a. i∝p0
b. i∝1/p0^2
c. i∝p0^2
d. i is independent of p0
e. i∝p0^4
Answers: 1
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