Sound Intensity and Inverse Square Law

This tutorial focuses on solving physics problems related to sound intensity. It covers calculating the intensity of sound from a speaker, determining the energy absorbed by an eardrum, and finding the power emitted by a sound source. The tutorial also explains the inverse square law and its application in calculating sound intensity at different distances.

What is the formula for calculating sound intensity?

• Power divided by the surface area of a sphere

• Power divided by the area of a circle

• Power multiplied by area

• Area divided by power

How do you convert 60 square millimeters to square meters?

• Divide by 1000 squared

• Multiply by 1000 squared

• Divide by 1000

• Multiply by 1000

What is the relationship between power and intensity?

• Power is intensity divided by area

• Power is intensity multiplied by area

• Power is area divided by intensity

• Power is the square of intensity

If the sound intensity is 3 x 10^-6 W/m² at 10 meters, what is the power emitted by the source?

• 3.77 x 10^-3 W

• 3.77 x 10^-6 W

• 3.77 W

• 3.77 x 10^3 W

What does the inverse square law state about sound intensity?

• Intensity is directly proportional to the distance squared

• Intensity is directly proportional to the distance

• Intensity is inversely proportional to the distance squared

• Intensity is inversely proportional to the distance

If the distance from a sound source is doubled, what happens to the intensity?

• It remains the same

• It becomes one-fourth

• It halves

• It doubles

Using the inverse square law, what is the intensity at 6 meters if it is 100 W/m² at 3 meters?

• 100 W/m²

• 75 W/m²

• 25 W/m²

• 50 W/m²

What is the intensity at 9 meters if it is 100 W/m² at 3 meters?

• 33.3 W/m²

• 44.4 W/m²

• 11.1 W/m²

• 22.2 W/m²

How do you calculate the ratio of two intensities using the inverse square law?

• r2 divided by r1

• r1 squared divided by r2 squared

• r2 squared divided by r1 squared

• r1 divided by r2

What is the intensity at a distance of 6 meters if the initial intensity is 100 W/m² at 3 meters?

• 100 W/m²

• 75 W/m²

• 25 W/m²

• 50 W/m²