Physics, 28.02.2020 21:31, McGregorshamara
A woman wearing an in-ear hearing aid listens to a television set at a normal volume of approximately60 dB. To hear it, she requires an amplification of30 dB, so the hearing aid supplies sound at90 dB to the ear canal, which we assume to be circular with a diameter of 6.4 mm .
What is the output power of the hearing aid?
Express your answer to two significant figures and include the appropriate units.
Answers: 3
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In order of decreasing light-transmitting capabilities of materials, which is the correct sequence? a. transparent -> translucent -> opaque b. opaque -> transparent -> translucent c. opaque -> translucent -> transparent d. translucent -> transparent -> opaque
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When electrons are added to the outermost shell of a carbon atom, it forms--an anion that has a larger anion that has a smaller cation that has a larger cation that has a smaller radius.
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Examples of states of consciousness include a. daydreaming b. dreaming during sleep c. hypnosis d. all of the above
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A woman wearing an in-ear hearing aid listens to a television set at a normal volume of approximatel...
Mathematics, 28.07.2019 04:34
Mathematics, 28.07.2019 04:34
Mathematics, 28.07.2019 04:34
Mathematics, 28.07.2019 04:34