Find the intensity level in decibels at that distance

Reference no: EM13551260

An outside loudspeaker (considered a small source) emits sound waves with a power output of 125 W. (a) Find the intensity 12.5 m from the source. ______W/m2 (b) Find the intensity level in decibels at that distance. ______dB (c) At what distance would you experience the sound at the threshold of pain, 120 dB? ______m

Reference no: EM13551260

Questions Cloud

What is the amplitude of the resulting alternating current : 1.00-kohm resistor, a 0.200-H inductor, and a 4.00-microF capacitor are connected in series with an AC generator; the EMF of the generator is given by (150 V)sin((377 rad/s)t). What is the amplitude of the resulting alternating current?

What is the voltage across the inductor : A resistor with R = 4.0 kohm is placed in series with a 240 V battery, an open switch, and an inductor having L = 36.0 mH. At some time after the switch has been closed, the current in the circuit is 15.0 mA. At this same instant in time, what is the..

How much energy is dissipated from the collision : A uniform rod of length L1 = 1.9 m and mass M = 3.0 kg is supported by a hinge at one end and is free to rotate in the vertical plane. The rod is released from rest in the position shown. A particle of mass m is supported by a thin string of lengt..

Maximum values of the radiated electric and magnetic fields : Assume that radiant energy from the sun arrives at your location with an intensity of 850 W/m2. In this EM radiation, what are the maximum values of the radiated electric and magnetic fields?

Find the intensity level in decibels at that distance : An outside loudspeaker (considered a small source) emits sound waves with a power output of 125 W. (a) Find the intensity 12.5 m from the source. ______W/m2 (b) Find the intensity level in decibels at that distance.

Vertical height does block reach above its starting point : A 2.0 wood block is launched up a wooden ramp that is inclined at a 31 angle. The block's initial speed is 5.0 . The coefficient of kinetic friction of wood on wood is muk= 0 .2 part A What vertical height does the block reach above its starting poin..

What is the matrix of the hamiltonian in this basis : The Hamiltonian of a system of two (spin- 1/2) electrons, H= ?1?z1+?2?z2 where ?z is the Pauli Matrix, ? is an energy parameter and our subscripts represent the two electrons 1 and 2. What is the basis where this Hamiltonian is diagonal and what is t..

Analyzing a nonlinear equation : Derive the first six terms of the Taylor series about t = 0 of the solution to equation with initial conditions 0(θ) = Π/12, θ'(0) = 0 and solve equation subject to the same initial conditions θ(0) = Π/12, θ'(0) = 0 and the same coordinate axes, grap..

What rate does the sun radiate energy : At what rate does the Sun radiate energy, given that it's essentially a spherical blackbody with radius 6.96x10^8 m and surface temperature 5800 K?

User Account

All Pages