The sound level at 1.0 m from a certain talking person talking is 60 dB. You are surrounded by five such people, all 1.0 m from you and all talking equally loud at the same time
The threshold of hearing is 1.0 × 10-12 W/m2. What sound level are you being exposed to? You can neglect any absorption, reflection, or interference of the sound. The threshold of hearing is
1.0 × 10-12 W/m2.
A) 300 dB
B) 60 dB
C) 74 dB
D) 67 dB
E) 81 dB
Answer: D
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A. small resistance in parallel. B. large resistance in parallel. C. small resistance in series. D. large resistance in series.
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Two identical tiny balls of highly compressed matter are 1.50 m apart. When released in an orbiting space station, they accelerate toward each other at 2.00 cm/s2. What is the mass of each of them? (G = 6.67 × 10-11 N ? m2/kg2)
What will be an ideal response?