The intensity level in decibels is defined as 10 log10(i/i0), where i0 is a reference intensity equal to the human threshold of hearing, 10–12 w/m2. what is the intensity of the threshold of pain, 120 decibels?

Explanation:

The intensity level is given by :

The intensity of the threshold of pain is 120 decibels

So, the intensity of the threshold pain is 1 W/m². Hence, this is the required solution.

  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

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west