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Question 5. A nailing gun produces a short, loud sound as the tool drives in a nail....

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Physics

Question 5.
A nailing gun produces a short, loud sound as the tool drives in anail. The sound has an intensity
level of 136 dB at the ear of the user (0.2 m from the tool), for aduration of 0.1 s.
(a) What is the corresponding sound intensity? (1.5 marks)
(b) The tool is a good approximation to a point source of sound.What is the rate at which it
produces sound energy? (1.5 marks)
(c) How much energy would be transported to the user’s eardrum (ofarea 6.0 x 10-5 m2) as the
tool drives in a nail? (1.5 marks)
(d) Explain why earplugs or earmuffs are recommended to be wornwhen using the tool.
(0.5 mark)

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