The howler monkey is the loudest land animal and, under some circumstances, can be heard up to a distance of 8.9 km
Assume the acoustic output of a howler to be uniform in all directions and that the threshold of hearing is 1.0 × 10-12 W/m2. A juvenile howler monkey has an acoustic output of What is the ratio of the acoustic intensity produced by the juvenile howler to the reference intensity I0, at a distance of 210 m?
A) 110
B) 230
C) 76
D) 170
E) 300
Answer: A
You might also like to view...
In an RL circuit, which of the following is a possible magnitude of a phase angle?
a. 45° c. 225° b. 315° d. 135°
A 1200 kg car is moving at 5.0 m/s EAST. It strikes an 1800 kg car at rest. The cars have an elastic collision and move in the EAST or WEST direction. The relative velocity between the cars after the collision is
A. 3.0 m/s WEST. B. 1.0 m/s EAST. C. 4.0 m/s EAST. D. 5.0 m/s EAST. E. 1.0 m/s WEST.
Which of the following makes a meson?
a) a photon and a graviton b) an up quark and an anti-down quark c) three up quarks d) a charm quark and a strange quark e) two down quarks and an anti-up quark
A device that transforms mechanical energy to electrical energy is a
A) generator. B) motor. C) transformer. D) magnet. E) none of the above