Your ears are sensitive to differences in pitch, but they are not very sensitive to differences in intensity. You are not capable of detecting a difference in sound intensity level of less than 1 dB. By what factor does the sound intensity increase if the sound intensity level increases from 60 dB to 61 dB

1.29

Explanation:

The level of intensity of sound (β) (in decibels, dB) is given by:

β  =  , where I = sound intensity in watts per meter squared and = reference intensity.

Change in sound intensity level (Δβ) = = 61 - 60 = 1

Δβ = = 1

        = 1

          = 1

                = = 1.29

Hence, the sound intensity will increase by a factor of 1.29.

2b2t

explanation:

2b2t

v=ir = 3x15 =45 v