At a rock concert, the sound intensity 1.0m in front of the bank of loudspeakers is 0.10 W/m^2. A fan is 30.0m from the loudspeakers. Her eardrums have a diameter of 8.4mm. How much energy is transferred to each eardrum in one second?

The amount of energy transferred to each eardrum in one second is .

Explanation:

Given: Intensity = 0.10

Now, at 30.0 m the intensity will be calculated as follows.

This means that the intensity is 900 times less assuming that the wave is spherical.

Hence, the new intensity is calculated as follows.

The area of ear drum is expressed as follows.

Formula used to calculate energy is as follows.

where,

P = power or energy

I = intensity

a = area

Substitute the values into above formula as follows.

Thus, we can conclude that amount of energy transferred to each eardrum in one second is .

electrical power

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.