The intensity level is 65 dB at a distance 5.00 m from a barking dog. What would be a reasonable estimate for the intensity level if two identical dogs very close to each other were barking? You can ignore any interference effects
A) 65 dB
B) 68 dB
C) 130 dB
D) 136 dB
B
You might also like to view...
Measured ages of globular clusters suggests that the Universe is about
a. 1.4 billion years old. b. 14 billion years old. c. 140 billion years old.
14C has a half-life of 6000 years. An ancient corpse is uncovered and found to have 1/32--one thirty-second--of the normal amount of 14C found in the bodies of people now living. How long has the body been dead?
A) 24,000 years B) 6000 years C) 12,000 years D) 30,000 years E) 36,000 years
In making a transition from state n = 1 to state n = 2, the hydrogen atom must
A) absorb a photon of energy 10.2 eV. B) emit a photon of energy 10.2 eV. C) absorb a photon of energy 13.58 eV. D) emit a photon of energy 13.58 eV.
A golf club hits a golf ball with a force of 2400 N. The golf ball hits the club with a force
A) slightly less than 2400 N. B) exactly 2400 N. C) slightly more than 2400 N. D) close to 0 N. E) Cannot be determined without additional information.