The sound of a band is rated as 50 dB at a distance of 30.0 m. What is the dB sound level of the band when one is 10.0 m from the band?
A. 59.5 dB
B. 57.3 dB
C. 55.2 dB
D. 52.9 dB
E. 50.1 dB
A. 59.5 dB
You might also like to view...
Sunspots often appear in pairs
Indicate whether the statement is true or false
An electron is bound in an infinite well (a box) of width 0.10 nm. If the electron is initially in the n = 8 state and falls to the n = 7 state, find the wavelength of the emitted photon
(c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, mel = 9.11 × 10-31 kg)
Cosmic rays are made of photons
a. True b. False Indicate whether the statement is true or false
Consider three galaxies, Alpha, Beta and Gamma. An astronomer in Beta sees each of the other two galaxies moving away from him in opposite directions at 0.70c. At what speed would an observer in Alpha see the galaxy Gamma moving?
A) 1.4c B) 0.94c C) 0.98c D) 0.82c E) 0.70c