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
Rus_ich [418]
3 years ago
8

In the early 19th century Christian Doppler, an Austrian physicist, proposed a theory regarding the properties of a moving sourc

e of sound. This is now known as Doppler’s law or the Doppler effect. What does this law state? A) The loudness of a moving source of sound is independent of the observer. B) The frequency of a moving source of sound is independent of the observer. C) The loudness of a moving source of sound is greater as it approaches an observer. D) The frequency of a moving source of sound is greater as it approaches an observer.
Physics
1 answer:
Lostsunrise [7]3 years ago
5 0

Answer:  D) The frequency of a moving source of sound is greater as it approaches an observer.

Explanation:

Doppler effect occurs when there is relative motion between source of sound and observer. The apparent frequency observed by observed is different from the actual frequency of the sound emitted from the source.

When the source and observer move closer, the apparent frequency is greater and when moving away, it is less than the actual frequency. Thus, the correct option is D.

The loudness is dependent on the amplitude of the sound which remains same.

You might be interested in
Explain the difference between a government Law and a Law of Science
yanalaym [24]

Answer:

U.S. Federal Government Law addresses government interactions on a national scale, and is largely composed of administrative law and constitutional law. ... State law also establishes and regulates local government for cities, towns, counties, and other communities.In general, a scientific law is the description of an observed phenomenon. It doesn't explain why the phenomenon exists or what causes it. The explanation of a phenomenon is called a scientific theory

Explanation:

3 0
3 years ago
Explain why radiation is dangerous to humans
tia_tia [17]
Radiation damages the cells that make up the human body, it can even cause cancer
7 0
3 years ago
Read 2 more answers
The relationship that exists between gravity and distance and mass respectively.
ruslelena [56]

Answer:

D...............................

7 0
3 years ago
To stretch a certain nonlinear spring by an amount x requires a force F given by F = 40 x − 6 x 2 , where F is in Newtons and x
strojnjashka [21]

Answer:

64 J

Explanation:

The potential energy change of the spring ∆U = -W where W = work done by force, F.

Now W = ∫F.dx

So, ∆U = - ∫F.dx = - ∫Fdxcos180 (since the spring force and extension are in opposite directions)

∆U = - ∫-Fdx

=  ∫F.dx

Since F = 40x - 6x² and x moves from x = 0 to x = 2 m, we integrate thus, ∆U =  ∫₀²F.dx

=  ∫₀²(40x - 6x²).dx

=  ∫₀²(40xdx - 6x²dx)

=  ∫₀²(40x²/2 - 6x³/3)

=  ∫₀²(20x² - 2x³)

= [20x² - 2x³]₀²

= [(20(2)² - 2(2)³) - (20(0)² - 2(0)³)

= [(20(4) - 2(8)) - (0 - 0))

= [80 - 16 - 0]

= 64 J

5 0
3 years ago
An object of mass m swings in a horizontal circle on a string of length L that tilts downward at angle θ. Find an expression for
VikaD [51]
We know that
g = LcosΘ 
<span>where g, L and Θ are centripetal gravity length, and angle of object
</span><span>ω² = g/LcosΘ </span>
<span>ω = √(g / LcosΘ) </span>
8 0
3 years ago
Read 2 more answers
Other questions:
  • Explain how birthrates and death rates influence the size of population.
    8·1 answer
  • We traveled all the way across the U.S. In some states, it rained; in others, it was hot and dry. But, the West Coast beaches we
    5·2 answers
  • The logarithm of x, written log(x), tells you the power to which you would raise 10 to get x. So, if y=log(x), then x=10^y. It i
    7·1 answer
  • What is true about empirical and molecular formulas?
    7·1 answer
  • What is the term for the ability to cause change in matter?
    6·1 answer
  • Simple harmonic motion occurs when an object is displaced from its stable equilibrium position and the force or torque pushing i
    14·1 answer
  • um can someone please help me I'm really stuck on this question and an explanation would be nice thank you
    9·1 answer
  • Thor deja caer su martillo de la torre Torre Stark que tiene 95 pisos, si al llegar el Mjolnir al piso han transcurrido 9.5 segu
    14·1 answer
  • According to the graph, how many students received an 90 for their first semester grade?
    11·1 answer
  • When a baseball is hit, it travels around 65 mps (meters per second). the mass of the baseball is 0.145 kg. what is the kinetic
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!