# physics

The average power dissipated in a stereo speaker is 56 W. Assuming that the speaker can be treated as a 4.0- resistance, find the peak value of the ac voltage applied to the speaker.

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1. Already answered. Try to understand what I wrote before. You still are writing - for ohms, apparenbtly

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posted by drwls
2. Except for the change from 56 to 54 W, refer to
http://www.jiskha.com/display.cgi?id=1201749991

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posted by drwls
3. If the current is composed of Na+ ions (q = +e), how many such ions flow in 0.7 s?

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posted by YANA

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