The frequency of the faintest audible sound is about 1,000hz. what is the pressure variation corresponding to this sound.

a. 1x10^-12pa

b. 3x1=^-5pa

c. 5x10^-2pa

d. 30.pa

Option B

Explanation:

Variation of pressure, is given by

Where v is the speed of sound, i is the intensity, rho is the density of air whose value is taken as 1.2 Kg/m3

Taking the speed of sound in air as 334 m/s then

thermal energy is the answer

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.