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Agata [3.3K]
3 years ago
9

Examine the droppler effect illustration above. Assume the red dot is a police car with its siren on. Which direction is the pol

ice car traveling
Physics
2 answers:
yanalaym [24]3 years ago
7 0

If you on USA TEST prep the answer was "RIGHT"

Vikki [24]3 years ago
5 0

<em>Something is missing in question. But I will try to explain you about Doppler effect to reach your answer.</em>

Answer:

  • It is defined as "an increase in the frequency of sound, light or other waves as the source or observer moves towards each other".
  • This effect causes the sudden change in pitch noticeable in passing siren.  
  • You hear a siren from a few blocks away. The source is a police car that is racing in your direction. As the car approaches, zooms past you, and then speeds off into the distance, the sound of its siren keeps changing in pitch. First the siren gets higher in pitch, and then it suddenly gets lower.


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A circuit contains three light bulbs in parallel. After observation, a fourth light bulb is added, also in parallel. How does th
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It has the same intensity.
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A teacher discusses a scientific theory that has been in place for almost a century. which would present the greatest challenge
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Answer: The theory might have become Obsolete or Superseded

Explanation:

A theory becomes obsolete or superseded if it becomes inadequate, false or incomplete in how its describes reality. It does not matter if it was once accepted. There are some theories such as Lysenkoism that are currently described as being obsolete because it does not conform to current reality. Another example of a theory that was superseded is the phlogiston theory. It was replaced a different theory of energy.

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starting from a stop a traffic signal, a car speeds up to 20 m/s in 5 seconds. calculate the acceleration of the car.
Ira Lisetskai [31]

Answer:

5.867 m/s^2

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Initial Speed > 0 m/s

Final Speed > 20 m/s

Time > 5 sec.

8 0
4 years ago
Explain how do winds cause surface currents?
igor_vitrenko [27]

Answer:

As wind or an ocean current moves, the Earth spins underneath it. ... The Coriolis effect bends the direction of surface currents to the right in the Northern Hemisphere and left in the Southern Hemisphere.

Explanation:

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8 0
3 years ago
A professor sits at rest on a stool that can rotate without friction. The rotational inertia of the professor-stool system is 4.
Anestetic [448]

Answer:

\omega=0.37 [rad/s]  

Explanation:

We can use the conservation of the angular momentum.

L=mvR

I\omega=mvR

Now the Inertia is I(professor_stool) plus mR², that is the momentum inertia of a hoop about central axis.

So we will have:

(I_{proffesor - stool}+mR^{2})\omega=mvR

Now, we just need to solve it for ω.

\omega=\frac{mvR}{I_{proffesor-stool}+mR^{2}}

\omega=\frac{1.5*2.7*0.4}{4.1+1.5*0.4^{2}}      

\omega=0.37 [rad/s]  

I hope it helps you!

5 0
4 years ago
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