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nikitadnepr [17]
3 years ago
9

How does the narrator react to being in the soccergame?​

SAT
1 answer:
ikadub [295]3 years ago
8 0

Answer: Maybe daydreaming about it as it was his or her first dream for being a soccer player. It depends on the story of the narrator.

Explanation:

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A bat emits a sound at a frequency of 3. 00 × 104 hz as it approaches a wall. The bat detects beats such that the frequency of t
OLga [1]

Taking into account the Doppler efect, the speed of the bat is closest to 5.02 \frac{m}{s}.

The Doppler effect is defined as the apparent frequency change of a wave produced by the relative movement of the source with respect to its observer. In other words, this effect is the change in the perceived frequency of any wave motion when the sender and receiver, or observer, move relative to each other.

The following expression is considered the general case of the Doppler effect:

f1=f\frac{v+-vR}{v+-vE}

Where:

  1. f1, f: Frequency perceived by the receiver and frequency emitted by the issuer respectively. Its unit of measurement in the International System (S.I.) is the hertz (Hz), which is the inverse unit of the second (1 Hz = 1 s⁻¹)
  2. v: Velocity of propagation of the wave in the medium. It is constant and depends on the characteristics of the medium. In this case, the speed of sound in air is considered to be 340 m/s
  3. vR, vE: Speed ​​of the receiver and the sender respectively. Its unit of measure in the S.I. is the m/s
  4. ±, ∓:
  • We will use the + sign:

In the numerator if the receiver approaches the sender

In the denominator if the sender moves away from the receiver

  • We will use the sign -:

In the numerator if the receiver moves away from the emitter

In the denominator if the sender approaches the receiver

In this case, a bat emits a sound at a frequency of 3.00×10⁴ Hz= 30,000 Hz as it approaches a wall.

The bat detects beats such that the frequency of the echo is 900 hz higher than the frequency the bat is emitting.

So, you know:

  • f1= 30,000 Hz + 900 Hz= 30,900 Hz
  • f= 30,000 Hz
  • v= 340 m/s
  • vE=vR= vbat
  • Receiver approaches the sender

Replacing in the expression is considered the general case of the Doppler effect:

30900 Hz=30000 Hz\frac{340 \frac{m}{s} +vbat}{340\frac{m}{s} -vbat}

Solving:

\frac{30900 Hz}{30000 Hz} =\frac{340 \frac{m}{s} +vbat}{340\frac{m}{s} -vbat}

1.03=\frac{340 \frac{m}{s} +vbat}{340\frac{m}{s} -vbat}

1.03×( 340\frac{m}{s} -vbat)= 340 \frac{m}{s} + vbat

1.03×340\frac{m}{s} - 1.03×vbat= 340 \frac{m}{s} + vbat

350.2\frac{m}{s} - 1.03×vbat= 340 \frac{m}{s} + vbat

350.2\frac{m}{s} - 340 \frac{m}{s}= vbat + 1.03×vbat

10.2 \frac{m}{s}= 2.03×vbat

10.2 \frac{m}{s}÷ 2.03 = vbat

<u><em>5.02 </em></u>\frac{m}{s}<u><em>= vbat</em></u>

In summary, the speed of the bat is closest to 5.02 \frac{m}{s}.

Learn more about the Doppler effect:

  • brainly.com/question/17107808
  • brainly.com/question/14929897
6 0
2 years ago
Categorize each statement as true or false. The SI V-Scope is a virtual microscope program which simulates the use of a compound
qaws [65]

The SI V-Scope is indeed a virtual microscope program that can stimulate the use of a compound light microscope so this is <u>TRUE</u>.

<h3>What is a SI V-Scope?</h3>

The SI V-Scope stands for a Science Interactive and then Virtual scope which is used simulate the way that a compound light microscope works.

These microscopes are very useful because they help people who don't have a physical microscope to access microscopes wherever they are.

Find out more on virtual microscopes at brainly.com/question/14469908

#SPJ1

3 0
2 years ago
The product of a number and 2 less than the number is 15. Find the number
boyakko [2]
X(x-2) = 15 where x = the unknown number
If you test all the answers in that equation, both x values in answer A yield 15, so the answer is A
3 0
3 years ago
PLEASE HELP I WILL GIVE BRAINLIEST TO FIRST CORRECT ANSWER!!!!
alexandr402 [8]

the answer is D good job  

7 0
3 years ago
Read 2 more answers
Triangle EFG is dilated by a scale factor of \frac{2}{3}
tatuchka [14]

Answer:

Explanation:

3/2

4 0
2 years ago
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