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
serg [7]
3 years ago
15

A fire engine is rapidly approaching you at a stop light. What happens to the frequency and pitch of the sound as the fire engin

e draws closer? The frequency increases, and the pitch decreases The frequency increases, and the pitch increases The frequency decreases, and the pitch decreases The frequency decreases, and the pitch increases
Physics
1 answer:
ValentinkaMS [17]3 years ago
7 0

Answer:

The frequency increases, and the pitch increases

Explanation:

  • Doppler's law of sound is applicable in such case when the observer or the sound source or both are moving relative to each other.
  • In such a case due to space-time constraint the waveform of the sound adjust themselves so as to obey the law of conservation of energy.

<u>The apparent frequency of the sound for the observer is given by:</u>

f_o=(\frac{s+v_o}{s+v_s} )f ....................................(1)

where:

f_o= observed frequency

f= original source frequency

s= speed of sound

v_s= speed of source relative to the observer (taken negative when approaching towards the observer and vice-versa)

v_o= speed of observer relative to the source (taken negative when moving away from the source and vice-versa)

<u>According to the given situation, eq. (1) becomes:</u>

f_o=(\frac{s}{s-v_s} )f

Since, \frac{s}{s-v_s} >1

Therefore

f_o>f

Pitch is very closely related to the frequency, it means that how fast is the amplitude of sound varying with time.

You might be interested in
Developed countries typically have _______.
Anna35 [415]

Answer:

Good government

Explanation:

Many people will think its natural resources but its not. Africa is a proof. They have resources but leadership is what makes most of their countries 3rd world. #BADGOVERNANCE

8 0
3 years ago
11. A disk 8.00 cm in radiu: rotates at a constant rate of 1200 revinin about its central axis Determine (a) its angular speed i
marshall27 [118]

Answer:

A disk 8.00 cm in radiu: rotates at a constant rate of 1200 revinin about its central axis Determine (a) its angular speed in zadians per second, (b) the tangential speed at a point 3.00 cm from its center, (c) the radial aceleration of a point on the rim, and (d) the total distance a point our tke rim noves ign-2.00 s (E) The moment of inertia if it's mass is 2Kg? is the answer

5 0
2 years ago
A coach tells his Little League players that hitting a 0.275 batting average, within 7% error, means that they had a really grea
Mashutka [201]

Yes. According to the coach's mathematical criteria, Tommy had a great season.

Sadly, Tommy doesn't even know it. His tone-deaf coach decided to describe success in terms that are absurd for 7-yr-olds, as well as for most of their parents.

7 0
3 years ago
A car is designed to last an average of 12 years with a standard deviation of 0.8 years. What is the probability that a car will
weeeeeb [17]
<span>-2,5SD = 2.1%
</span>first u need to find number of standard deviations and look up on table what percentage that is
8 0
3 years ago
Read 2 more answers
Now explore friction force. Set the piece of plastic or wood on the table and push it steadily across the tabletop using your fi
photoshop1234 [79]

Answer: Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact

5 0
3 years ago
Other questions:
  • The conductive tissues of the upper leg can be modeled as a 40-cm-long, 12-cm-diameter cylinder of muscle and fat. The resistivi
    8·1 answer
  • What are the limitations of using solar panels?
    5·1 answer
  • PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
    15·1 answer
  • Pleeeeeeease help asap
    10·1 answer
  • Light of wavelength 652 nm in vacuum is incident on a single slit whose width is 1.60 × 10-5 m. The setup is then immersed in wa
    6·1 answer
  • A 170.4-turn circular loop of radius 0.08 meters with a magnetic field B passing through the area bounded by the loop at right a
    11·1 answer
  • A simple model of the hydrogen atom suggests that the electron orbits the proton. What is the
    8·1 answer
  • What is the kinetic energy of a 130 kg football lineman running at 6m/s?
    10·1 answer
  • 3. Why is the term cold blooded a misconception? Explain​
    8·1 answer
  • An electric fan rotates at 800rev/min.consider a point on the blade a distance of 0.16m from the axis, calculate the velocity of
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!