A Н20= C=1 h=4 o=4 2. H3PO4 + КОН KзРО І

A woman stands at rest in front of a large, smooth wall. She holds a vibrating tuning fork of frequency Initial: fo directly in

jeka57 [31]

Answer:

(a) $f_{o}*\frac{2P_{w} }{v - P_{w} }$

(b) $f_{o}*\frac{2P_{w} }{v + P_{w} }$

Explanation:

(a) In the given problem, the turning fork has a frequency of $f_{o}$ . Then, a woman runs toward the wall with a speed of $P_{w}$ . From the principle of light reflection, the reflection of the sound from the fork reach the woman at a speed of v. Thus, the beat frequency is:

$f_{o}*\frac{2P_{w} }{v - P_{w} }$

(b) In this part, the woman moves away from the water which is in contrast to part (a). Thus the beat frequency is:

$f_{o}*\frac{2P_{w} }{v + P_{w} }$

7 0

3 years ago

Starting over, so here's some points! Take em ~Jayden

Serhud [2]

Answer:

Thank you again!!!! :D

8 0

3 years ago

Read 2 more answers

Unless indicated otherwise, assume the speed of sound in air to be v = 344 m/s. A pipe closed at both ends can have standing wav

uranmaximum [27]

Answer:

68.8 Hz

137.6 Hz, 206.4 Hz

Explanation:

L = Length of tube = 2.5 m

v = Velocity of sound in air = 344 m/s

Distance between nodes is given by

$L=\dfrac{\lambda}{2}+m\dfrac{\lambda}{2}\\\Rightarrow \dfrac{\lambda(n+1)}{2}=L\\\Rightarrow \lambda=\dfrac{2L}{n+1}$

Where n = 0, 1, 2, 3, ...

Making n+1 = n

$\lambda=\dfrac{2L}{n}$

where n = 1, 2, 3 .....

For fundamental frequency n = 1

$\lambda=\dfrac{2\times 2.5}{1}\\\Rightarrow \lambda=5\ m$

Frequency is given by

$f=\dfrac{v}{\lambda}\\\Rightarrow f=\dfrac{344}{5}\\\Rightarrow f=68.8\ Hz$

The fundamental frequency is 68.8 Hz

First overtone

$2f=2\times 68.8=137.6\ Hz$

Second overtone

$3f=3\times 68.8=206.4\ Hz$

The overtones are 137.6 Hz, 206.4 Hz

4 0

3 years ago

some animals communicate by emitting low frequency sound waves.When the animal emits a low frequency sound wave what is the resu

valentina_108 [34]

Pitch is way to relate a sound to its frequency. High frequencies have high pitches (think of a flute), and low frequencies have low pitches (think of a bass).

7 0

3 years ago

A meter stick is held vertically with one end on the floor and is then allowed to fall. Find the speed of the other end when it

Ilia_Sergeevich [38]

Below is the attachment of the solutions.

5 0

4 years ago