Here,
for the intensity
Intensity = energy/(area * time )
Intensity = 0.27/(0.30^2 * 15)
Intensity = 0.20 W/m^2
the intensity of the wave is 0.20 W/m^2
4. [3 pts] You have a square drum with side length 0.3 m that absorbs a...
A sound wave with intensity 2 × 10-3 W / m^2 is considered as moderately loud to our ears. The drum inside our ear has a diameter of 6 mm. Show that the energy transferred to the drum of our ear if you hear the above sound wave for 60 seconds is E = 3.4 × 10-6 J. Consider the drum as a round surface.
Two speakers are located at two neighboring corners of a square of side length 10.0 m. A listener walks from another corner of the square along the side toward the speaker next to her. Assuming that the two speakers are playing the same 75.0-Hz tone in phase and the sound speed in the air is 343 m/s, how many constructive interfere points will the listener encounter?
(a) Consider a rectangular drum lid with side lengths 4 and 5. If the natural frequencies lm,n are ordered from smallest to largest, write down the first three natural frequencies for wave speed c=1/T. Smallest Am,n Second smallest Am,n 13 Third smallest Im,ne (b) Degenerate modes are normal modes um,n and up, with identical natural frequencies, for which (m, n) + (8,9). For example, in the 2 x 1 rectangle, modes 04,1 and 42,2 are degenerate as they both have...
2. (15 pts) A uniform density flat solid square has a total mass M and side length L. It lies on a horizontal frictionless surface, as shown in the top view below. It is pivoted at one corner. Three forces, each of magnitude F, act on the square as shown. Pivot L A TOP VIEW: I----- What is the magnitude of the angular acceleration of the square while these forces act as shown? Put your answer in terms of only...
5. A square of side length 15 cm has a magnetic field of strength 0.75 T passing through it, at an angle of 25 degrees relative to the normal. a) What is the magnetic flux passing through the square? (12.5 pts.) b) If the angle is varied from its initial orientation of 25 degrees to one of 90 degrees relative to the normal, over a time period of 0.35 seconds, what is the induced voltage in the square loop? (12.5...
Three charges are positioned at three corners of a square of
side length a = 0.5 m as shown in the figure. The charges have
values +2Q, -Q, and +Q, as shown, where Q = 7 μC. What is the
y-component of the force on the charge +2Q? a. F = -1.14 N b. F =
4.77 N c. F = -1.76 N d. F = -4.77 N e. F = -2.28 N What is the
work required to create...
Problem 4 (6 pts) A tire explodes 200m from you. You measure the sound intensity at 4.00×10-2 W/m2 for 0.1s. a) What is the total amount of energy transferred away from the explosion by sound? b) What sound level (in decibels) do you hear?
physics help asap
3. Two charges, each+9.01 HC, are placed on the Northwest and Southeast corners of a square with sides of length 1.80 m. a.) (2.50 pts) What is the magnitude and direction of the electric field at the Northeast corner of the square due to the Northwest charge? b.) (2.50 pts) What is the magnitude and direction of the electric field at the Northeast corner of the square due to the Southeast charge? c.) (3 pts) What is...
A square loop of wire with side length 0.200 m carries a current of 1.65 A. What is the magnitude of the magnetic field along the axis of the square loop, 2.40 m from the center? ____ T Please show all work
You have a piece of string with a length of 4.0 m and a total mass of 0.200 kg. You stretch the string between two supports with a tension of 5.0 N. You then excite a traveling wave by shaking the left end of the string up and down so that: y(x = 0, t) = (1.0 cm) cos(2π(1.0 Hz)t) a) What are the wave speed, frequency, wavelength, angular frequency and wavenumber of the resulting sinusoidal traveling wave? b) What...