. Friction is a rubbing force that a spinning yo-yo. slows down
speeds up
adds energy to
does not affect

The intensity, or loudness, of a sound can be measured in decibels (db), according to the equation , where i is the intensity of a given sound and is the threshold of hearing intensity. what is the intensity, in decibels, [i(db)], when ? use a calculator. round to the nearest whole number. 8 9 19 80

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What are two different ways you could find the value of a? explain these methods.