For research purposes a sonic buoy is tethered to the ocean floor and emits an i
ID: 1549315 • Letter: F
Question
For research purposes a sonic buoy is tethered to the ocean floor and emits an infrasonic pulse of sound (speed = 1522 m/s). The period of this sound is 55 ms. Determine the wavelength of the sound.
________________ m
A 26.0- resistor, a 12.0-µF capacitor, and a 17.0-mH inductor are connected in series with a 160-V generator.
(a) At what frequency is the current maximum?__________ Hz
(b) What is the maximum value of the rms current?
_____________ A
An echo is sound that returns to you after being reflected from a distant surface (e.g., the side of a cliff). Assuming that the distances involved are the same, an echo under water and an echo in air return to you _____________________
at the same time. at different times, the echo under water returning more quickly. at different times, the echo under water returning more slowly.
Explanation / Answer
here,
surface area = 2.2 * 10^-3 m^2
sound intensity , I= 3.7 * 10^-6 W/m^2
let the power intercepted be P
I = P /surface area
3.7 * 10^-6 = P /( 2.2 * 10^-3)
P = 8.14 * 10^-9 W
the power intercepted is 8.14 * 10^-9 W