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Marta_Voda [28]
2 years ago
10

What is Doppler effect​

Physics
1 answer:
arsen [322]2 years ago
5 0

Doppler effect is the shift in frequency as the object gets near an object/person or far away from an object or person.

  • When the frequency of a police car is heard from far away, the frequency is low and long wave lengths
  • When the frequency of a police car is heard from near, the frequency is high and short-wave lengths

Hope it helps!

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Find initial velocity and time in air​
kkurt [141]

Answer:

The answer to your question is: v = 121.46 m/s

Explanation:

Data

h = 30 m

vo = ?

dx = 300 m

Formula

t = \sqrt{\frac{2h}{g}}

speed = distance / time

Process

t = \sqrt{\frac{2(30)}{9.81}} \\

t= 2.47 s

speed = 300 / 2.47

speed = v = 121.46 m/s

6 0
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Which characteristic(s) makes ionic compounds useful as a building material?
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A rocket initially at rest accelerates at a rate of 99.0 meters/second ^2.Calculate the distance covered by the rocket if it. At
Pani-rosa [81]

The distance covered is 1000 m

Explanation:

The rocket is moving by uniformly accelerated motion, so we can find the distance it covers by using the following suvat equation:

s=vt-\frac{1}{2}at^2

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v is the final velocity

t is the time

a is the acceleration

For the rocket in this problem, we have:

v = 445 m/s is the final velocity

a=99.0 m/s^2 is the acceleration

t = 4.50 s is the time

Substituting, we find the distance covered:

s=(445)(4.50)-\frac{1}{2}(99.0)(4.50)^2=1000 m

Learn more about accelerated motion:

brainly.com/question/9527152

brainly.com/question/11181826

brainly.com/question/2506873

brainly.com/question/2562700

#LearnwithBrainly

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4 years ago
I need help solving this
Alja [10]

Answer: let me think

Explanation:

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