True or false
1. The upper mantle is also known as the mesosphere
2. Earthquakes can be found...
Physics, 25.02.2021 19:00 naimareiad
True or false
1. The upper mantle is also known as the mesosphere
2. Earthquakes can be found at both transform and convergent boundaries. However, at
convergent boundaries, the earthquakes are the strongest.
Answers: 1
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During takeoff, the sound intensity level of a jet engine is 170db at a distance of 34 m. what's the sound intensity level at a distance of 1.0 km?
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If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.
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Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.
Answers: 2
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