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Sphinxa [80]
3 years ago
5

A trumpet creates a sound wave that has a wave speed of 350m/s and a wavelength of 0.8 m . What is the frequency of the sound wa

ve
Physics
1 answer:
ValentinkaMS [17]3 years ago
7 0

Answer:

The frequency of sound wave created by trumpet is 437.5Hz

Explanation:

Given

the speed of sound wave = 350 ms^{-1}

the wavelength of sound wave = 0.8 m

the frequency of sound wave = ?

All the waves have same relationship among wavelength, frequency and speed, which is given by the equation:

v = fλ, where

v is speed of the wave

f is frequency of the wave

λ is wavelength of the wave

therefore frequency of sound wave is given by

f = v/λ

 = 350ms^{-1}/0.8m

 = 437.5s^{-1}

 = 437.5Hz (since 1 s^{-1} = 1 Hz (Hertz)

Hence the frequency of sound wave created by trumpet is 437.5Hz

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An AC generator consists of eight turns of wire, each of area 0.0775 m2 , and total resistance of 8.53 Ω. The loop rotates in th
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Answer:

44.08 Volt

Explanation:

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If you drop a ball off a cliff, it starts out at 0 m/s. after 1 s, it will be traveling at about 10 m/s. if air resistance is re
anastassius [24]

The ball dropped of a cliff will have a final velocity of 19.6 m/s at 2s

The free fall formula and the procedure we will use is:

fv = g* t

Where:

  • fv = final velocity
  • g = acceleration due to gravity
  • t = time taken
  • h = height traveled

Information of the problem:

  • g = 9.8 m/s².
  • t = 2 s
  • vf = ?

Applying final velocity formula we get:

fv = g* t

fv = 9.8 m/s² * 2 s

fv = 19.6 m/s

<h3>What is free fall?</h3>

It is when the object or mobile falls from a height (h) with a positive acceleration equal to the gravity, describing a vertical rectilinear travel.

Learn more about free fall at brainly.com/question/11257529

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1 year ago
Can friction ever<br> do positive work?
PtichkaEL [24]

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3 years ago
You hike two thirds of the way to the top of a hill at a speed of 2.9 mi/h and run the final third at a speed of 5.6 mi/h. What
Marta_Voda [28]

Answer:

The average speed is 3.5 mi/h

Explanation:

Average speed is given by

Average speed = \frac{Total distance}{Total time}

If the total distance covered is x mi,

Then \frac{2}{3}x mi was covered while hiking and

\frac{1}{3}x mi was covered while running.

Now, we will find the time taken while hiking and the time taken while running

Speed = \frac{Distance}{ Time}\\  Time = \frac{Distance}{Speed}

  • For the time taken while hiking

Speed = 2.9 mi/h

Distance = \frac{2}{3}x mi

From,

Time = \frac{Distance}{Speed}

Time = \frac{\frac{2}{3}x }{2.9}

Time = 0.2299x h

Time taken while hiking is 0.2299 h

  • For the time taken while running

Speed = 5.6 mi/h

Distance = \frac{1}{3}x mi

Time = \frac{Distance}{Speed}

Time = \frac{\frac{1}{3}x }{5.6}

Time = 0.05952x h

Now, for the average speed

Average speed = \frac{Total distance}{Total time}

Total distance = \frac{2}{3}x mi  + \frac{1}{3}x mi = x mi

Total time = 0.2299x + 0.05952x = 0.28942x h

∴ Average speed = \frac{x}{0.28942x}

Average speed = 3.4552 mi/h

Average speed ≅ 3.5 mi/h

3 0
3 years ago
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