Letra a obrigadoaijahahavqvqgqgqg
Answer:
f = 3.1 kHz
Explanation:
given,
length of human canal =2.8 cm = 0.028 m
speed of sound = 343 m/s
fundamental frequency = ?
The fundamental frequency of a tube with one open end and one closed end is,
![f = \dfrac{v}{4L}](https://tex.z-dn.net/?f=f%20%3D%20%5Cdfrac%7Bv%7D%7B4L%7D)
![f = \dfrac{343}{4\times 0.028}](https://tex.z-dn.net/?f=f%20%3D%20%5Cdfrac%7B343%7D%7B4%5Ctimes%200.028%7D)
![f = \dfrac{343}{0.112}](https://tex.z-dn.net/?f=f%20%3D%20%5Cdfrac%7B343%7D%7B0.112%7D)
f = 3062.5 Hz
f = 3.1 kHz
hence, the fundamental frequency is equal to f = 3.1 kHz
For most healthy adults, the Department of Health and Human Services recommends these exercise guidelines: Aerobic activity. Get at least 150 minutes a week of moderate aerobic activity or 75 minutes a week of vigorous aerobic activity. You also can do a combination of moderate and vigorous activity.
During a total solar eclipse, the moon passes between Earth and the sun. This completely blocks out the sun’s light. However, the moon is about 400 times smaller than the sun. How can it block all of that light?
Given the time, the final velocity and the acceleration, we can calculate the initial velocity using the kinematic equation A:
![v = v_o + a \Delta t](https://tex.z-dn.net/?f=v%20%3D%20v_o%20%2B%20a%20%5CDelta%20t)
A skateboarder flies horizontally off a cement planter. After a time of 3 seconds (Δt), he lands with a final velocity (v) of −4.5 m/s. Assuming the acceleration is -9.8 m/s² (a), we can calculate the initial velocity of the skateboarder (v₀) using the kinematic equation A.
![v = v_o + a \Delta t\\\\v_o = v - a \Delta t = (-4.5 m/s) - (-9.8 m/s^{2} ) \times 3 s = 24.9 m/s](https://tex.z-dn.net/?f=v%20%3D%20v_o%20%2B%20a%20%5CDelta%20t%5C%5C%5C%5Cv_o%20%3D%20v%20-%20a%20%5CDelta%20t%20%3D%20%28-4.5%20m%2Fs%29%20-%20%28-9.8%20m%2Fs%5E%7B2%7D%20%29%20%5Ctimes%203%20s%20%3D%2024.9%20m%2Fs)
Given the time, the final velocity and the acceleration, we can calculate the initial velocity using the kinematic equation A:
![v = v_o + a \Delta t](https://tex.z-dn.net/?f=v%20%3D%20v_o%20%2B%20a%20%5CDelta%20t)
Learn more: brainly.com/question/4434106