1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Tcecarenko [31]
3 years ago
15

A sound wave (a periodic longitudinal wave) from a loudspeaker travels from air into water. The frequency of the wave does not c

hange, because the loudspeaker producing the sound determines the frequency. The speed of sound in air is 343 m/s, whereas the speed in fresh water is 1482 m/s. When the sound wave enters the water, does its wavelength increase, decrease, or remain the same
Physics
1 answer:
Tanzania [10]3 years ago
6 0

Answer:

When the sound wave enters the water its wavelength increase.

Explanation:

Given:

Speed of sound in air v = 343 \frac{m}{s}

Speed of sound in fresh water v' = 1482 \frac{m}{s}

We know that when wave travel into one medium to another medium frequency doesn't change.

Velocity is given by,

  v = f \lambda

In above equation frequency is constant,

So when sound wave enters the water wavelength increase because speed sound is increase in water as compare to air.

Therefore, when the sound wave enters the water its wavelength increase.

You might be interested in
ANSWER ASAP PLEASEEE Kendra wonders what would happen if the oceans did not exist on Earth. Based on her understanding of the oc
Cloud [144]

Answer:

that there would be more clouds.

Explanation:

one of the cycles is precipitation. without water there would be no rain and clouds are what causes the rain to come down

7 0
3 years ago
A bicyclist moves along a straight line with an initial velocity vo and slows downs. Which of the following the best describes t
xeze [42]

????????????????????

3 0
3 years ago
Calculate the efficiency for each machine, then answer the question. Machine A has an input work of 1,000 J and an output work o
Usimov [2.4K]
Machine C. Machine A has an efficiency of 250/1000 = 0.25 = 25%, Machine B's efficiency is 350/500 = 0.7 = 70% and Machine C has an efficiency of 150/200 = 0.75 = 75%.
7 0
3 years ago
Read 2 more answers
The law of reflection says that the angle of incidence is
nekit [7.7K]
The law of reflection states that the angle of incidence is equal to the angle of reflection. Furthermore, the law of reflection states that the incident ray, the reflected ray and the normal all lie in the same plane.

hope this helps :)

4 0
3 years ago
Chứng minh mặt trời là nguồn gốc của tất cả nguồn năng lượng
Hatshy [7]

An Excerpt from “Optimism”

by Helen Keller

1 Could we choose our environment, and were desire in human undertakings synonymous with

endowment, all men would, I suppose, be optimists. Certainly most of us regard happiness as

the proper end of all earthly enterprise. The will to be happy animates alike the philosopher, the

prince and the chimney-sweep. No matter how dull, or how mean, or how wise a man is, he feels

that happiness is his indisputable right.

2 It is curious to observe what different ideals of happiness people cherish, and in what singular

places they look for this well-spring of their life. Many look for it in the hoarding of riches, some

in the pride of power, and others in the achievements of art and literature; a few seek it in the

exploration of their own minds, or in the search for knowledge.

3 Most people measure their happiness in terms of physical pleasure and material possession.

Could they win some visible goal which they have set on the horizon, how happy they would be!

Lacking this gift or that circumstance, they would be miserable. If happiness is to be so

measured, I who cannot hear or see have every reason to sit in a corner with folded hands and

weep. If I am happy in spite of my deprivations, if my happiness is so deep that it is a faith, so

thoughtful that it becomes a philosophy of life,—if, in short, I am an optimist, my testimony to

the creed of optimism is worth hearing....

4 Once I knew the depth where no hope was, and darkness lay on the face of all things. Then

love came and set my soul free. Once I knew only darkness and stillness. Now I know hope and

joy. Once I fretted and beat myself against the wall that shut me in. Now I rejoice in the

consciousness that I can think, act and attain heaven. My life was without past or future; death,

the pessimist would say, “a consummation devoutly to be wished.” But a little word from the

fingers of another fell into my hand that clutched at emptiness, and my heart leaped to the

rapture of living. Night fled before the day of thought, and love and joy and hope came up in a

passion of obedience to knowledge. Can anyone who has escaped such captivity, who has felt

the thrill and glory of freedom, be a pessimist?

5 My early experience was thus a leap from bad to good. If I tried, I could not check the

momentum of my first leap out of the dark; to move breast forward is a habit learned suddenly

at that first moment of release and rush into the light. With the first word I used intelligently, I

learned to live, to think, to hope. Darkness cannot shut me in again. I have had a glimpse of the

shore, and can now live by the hope of reaching it.

6 So my optimism is no mild and unreasoning satisfaction. A poet once said I must be happy

because I did not see the bare, cold present, but lived in a beautiful dream. I do live in a

beautiful dream; but that dream is the actual, the present,—not cold, but warm; not bare, but

furnished with a thousand blessings. The very evil which the poet supposed would be a cruel

6) Read the last sentence from the text.

Only by contact with evil could I have learned to feel by contrast the beauty of truth and love and goodness.

Explain how Helen Keller develops this idea in the text. Use specific details to

support your answer.

8 0
3 years ago
Other questions:
  • Jenna made an electric circuit as seen in the picture. She placed a thermometer near her light bulb. The light bulb was turned o
    7·2 answers
  • Why is it important to consider experimental error in all the empirical results presented?
    7·2 answers
  • An athelete swims from northend to southend of a 50.0m pool in 20.0s and makes the return trip to the starting position in 22.0s
    6·1 answer
  • A protostar forms once the nebular cloud condenses and the core begins
    14·2 answers
  • A charge q produces an electric field of strength 4E at a distance of d away. Determine the electric field strength at a distanc
    6·1 answer
  • A ray of light strikes a smooth surface and is reflected. The angle of incidence is 35°. What can be predicted about the angle o
    5·2 answers
  • a bullet of mass 25 g is fired from a pistol at a velocity of 200 m/s. if mass of the pistol is 2.5 kg calculate its recoil velo
    10·1 answer
  • Emma is conducting an investigation to compare several physical properties of samples of two different kinds of rocks. When she
    14·1 answer
  • Why is centrifugal force is a fake force?<br>​
    10·1 answer
  • In a double slit experiment, if the separation between the two slits is 0.050 mm and the distance from the slits to a screen is
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!