At a distance of 15.0 m from a sound source, the intensity level is 60.0 dB. What is the intensity level (in decibels) at a point 2.00 m from the source if the source radiates equally in all directions?

a) 77.5 dB
b) 57.5 dB
c) 75.5 dB
d) 55.7 dB

The intensity level is 77.5 dB.

(a) is correct option.

Explanation:

Given that,

Distance

Distance

Intensity level = 60.0 dB

We know that,

Here, Intensity is inversely proportional to the square of the distance.

We need to calculate the intensity level

Using formula of intensity level

Now,

Put the value of intensity

Hence, The intensity level is 77.5 dB.

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is