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Author Question: A ten-year exposure to the sound of a riveting machine will cause your threshold of hearing to shift ... (Read 95 times)

Zulu123

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on: Jul 29, 2018
A ten-year exposure to the sound of a riveting machine will cause your threshold of hearing to shift from 0 dB to 30 dB. What is the sound intensity corresponding to 30 dB? The normal lowest detectable intensity is 1.0  10-12 W/m2.
 
  What will be an ideal response?

Question 2

A rescue plane flying horizontally at 72.6 m/s spots a survivor in the ocean 182 m directly below and releases an emergency kit with a parachute. Because of the shape of the parachute, it experiences insignificant horizontal air resistance.
 
  If the kit descends with a constant vertical acceleration of 5.82 m/s2, how far away from the survivor will it hit the waves? A) 574 m
  B) 4.54 km
  C) 406 m
  D) 602 m


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dyrone

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Reply #1 on: Jul 29, 2018
Answer to Question 1

1.0  10-9 W/m2

Answer to Question 2

A


Zulu123

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Reply 2 on: Jul 29, 2018
:D TYSM

parshano

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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