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
1 answer:
Answer:
The frequency of sound wave created by trumpet is 437.5Hz
Explanation:
Given
the speed of sound wave = 350 m
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
= 350m/0.8m
= 437.5
= 437.5Hz (since 1 = 1 Hz (Hertz)
Hence the frequency of sound wave created by trumpet is 437.5Hz
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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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Answer:
The average speed is 3.5 mi/h
Explanation:
Average speed is given by
If the total distance covered is mi,
Then mi was covered while hiking and
mi was covered while running.
Now, we will find the time taken while hiking and the time taken while running
- For the time taken while hiking
Speed = 2.9 mi/h
Distance = mi
From,
Time = h
Time taken while hiking is 0.2299 h
- For the time taken while running
Speed = 5.6 mi/h
Distance = mi
Time = h
Now, for the average speed
Total distance = mi +
mi =
mi
Total time = +
=
h
∴
Average speed = 3.4552 mi/h
Average speed ≅ 3.5 mi/h