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Answers
Answer:
1. compression -- A, C, E, G, I, K.
rarefaction -- B, D, F, H, I.
2. here, the Person from 1 spaceship can't here the sound of other. bcz there are no air particles nor any other medium that can make travelling of sound waves possible.
task B...
3 A. loudness of sound is directly proportional to the amplitude of sound waves.
Sounds Intensities Permissible exposure time
City Traffic 85 dB 8 hours
Bulldozer 88 dB 4 hours
Jazz Concert 91 dB 2 hours
Power Mower 94 dB 1 hour
Nightclub 97 dB 30 minutes
Ambulance Siren 100 dB 15 minutes
Rock Concert 115 dB 30 seconds
sounds above 180 - 200 dB are really harmful for our ears and can even make a person deaf.
hope it may help u.
thank u.
Answer:
Compression : A, C, E, G, I, K.
Rarefaction : B, D, H, F, I.
2. The film does not based on laws of physics if the inhabitants of the spaceship in outer space hear the sound of a nearby spaceship as it zooms past at high speeds.
- Outer space is a mere vacuum without any medium .Sound can not travel in vacuum . It needs a medium to propagate .
- Thus , the inhabitants actually can't hear the sound