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
aivan3 [116]
3 years ago
10

Why did boy (the observer) hear the pitch of the sound change? What does this tell us about the frequency of the sound? Support

your conclusion based on results from the experiment and your knowledge of sound waves.
Physics
1 answer:
timofeeve [1]3 years ago
5 0

Answer:

<u>because of the doppler effect</u>

Explanation:

<em>Remember</em>, the doppler effect refers to the changes in sound (frequency of sound) observed by a person who is in a position relative to the wave source.

In this example, we notice as the train comes closer to the boy, the sound becomes louder also increasing the pitch slightly, the doppler effect sets in when the train passes the boy because the boy notices a decrease in the pitch of the moving train.

We learn from the change in the observed sound of the train that the frequency of the sound is determined by the distance of the observer from the wave source.

In other words, the closer the source of the sound to the observer; the faster it travels to the observer, however, the farther it is; the lesser it is; the greater the sound heard.

You might be interested in
Much of the oil and natural gas in the united states is located in
lana66690 [7]

Answer:

oil production in the USA are majorly from this states:

1.Texas

2. North Dakota

3. California

4. Alaska

5. New Mexico

6. Oklahoma

7.Colorado

8. Wyoming

Explanation:

While other states have seen a boom in recent years, Texas is still the epicenter of the U.S. oil industry, with 27 operable refineries, more than any state. Texas produced 1.2 billion barrels of oil in 2014, which accounted for 36% of total U.S. output, and the state has almost one-third of all proven oil reserves with 10.5 billion barrels.

8 0
3 years ago
A 54-kg jogger is running at a rate of 3m/s.What is the kinetic energy f the jogger
leonid [27]
KE=1/2mv²
KE=1/2*54*3²
KE=243 J
6 0
4 years ago
Read 2 more answers
Con que nombre se conocieron los primeros gimnasio que se crearon​
notsponge [240]

Answer:

Los primeros gimnasios registrados datan de hace más de 3000 años en la antigua Persia, donde se los conocía como zurkhaneh, áreas que fomentaban la aptitud física.

7 0
3 years ago
A steam power plant with a power output of 200 MW consumes coal at a rate of 700 tons/h. If the heating value of the coal is 40,
RUDIKE [14]

Answer:

η = 2.57%

Explanation:

Given:

Output power of the steam power plant, P(out) = 200 MW

Consumption of coal, m = 700 tons/h = (700 × 10³)/3600 kg/s= 194.44 kg/s

Heating capacity of the coal, Cv = 40000 kJ/kg

now,

Input power,  P(in) = mCv

or

P(in) =  194.44 kg/s × 40000 = 7777.77 MW

thus,

efficiency, η = P(out)/P(in) = (200 MW) / (7777.77 MW) = 0.02571

or

η = 2.57%

3 0
4 years ago
What is the ultimate energy for all life on earth
professor190 [17]
The sun. Is the answer
7 0
3 years ago
Other questions:
  • A solid insulating sphere of radius R = 1.0 m that carries a positive charge Q1 = 1.0 mC uniformly distributed over it is concen
    7·1 answer
  • The following molecule can be synthesized from an epoxide and alkyllithium reagent, followed by aqueous workup. However, there a
    8·1 answer
  • During the winter, what type of precipitation would most likely fall in New York, with temperatures averaging 32 F?
    15·2 answers
  • When a space shuttle was launched, the astronauts aboard experienced and acceleration of 29.0 m/s. If one of the astronauts had
    9·1 answer
  • Cross-Text Discussion​
    6·1 answer
  • If a car is moving at a constant velocity of 10 m/s, what is its acceleration?
    5·1 answer
  • All power plants use fuel to supply energy that turns into:
    12·1 answer
  • Shrill sound is of -------------- *
    11·1 answer
  • một vật có khối lượng m=1kg trượt trên mặt phẳng nghiêng hợp mới mặt đất một góc a sao cho sina=0.1 .sau khi trượt hết mặt phẳng
    7·1 answer
  • Why do most carnivores live in forest? given reason ​
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!