The humanvoice. the human vocal tract is a pipe that extendsabout 16 cm from the lips to thevocal folds (also called the "vocal cords") near the middle of yourthroat. the vocal folds behave rather like the reed of a clarinet, and the vocal tract acts like a stopped pipe. estimate the firstthree standing-wave frequencies of the vocal tract. use v = 344 m/s. (the answers are only anestimate, since the position of lips and tongue affects the motionof air in the vocal tract.)lowest frequencyhzsecond frequencyhzthird frequencyhz

Lowest frequency = 537.5 Hz

Third frequency=2687.5 Hz

Explanation:

Given that

Length of pipe ,L= 16 cm

Speed of sound,V = 344 m/s

Also given that it behave like stopped pipe and we know that fundamental frequency for this type of system given as

Now by putting the values

Now second harmonic frequency

Now third harmonic frequency

the word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer

c. magnitude and direction