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

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?

Anika asks eva to roll a basketball and then a bowling ball to her. which requires more force to roll, and why?