The formant frequencies of speech are also influenced by the density of the propagating medium. The human vocal tract is approximately 17 cm long. What is the first and second formants of this voice? The velocity of sound in air is Vair=331m/s. Write your answers with 1 decimal place. (Hint: How can you use the length of the vocal tract to find the frequency? )

Which of the following is not a characteristic of s waves? a. travel slower than p waves. b. cannot be detected in locations more than 105° from an earthquake’s epicenter. c. travel through solids and liquids. d. only affect coastal regions.

What is the energy of a photon of ultraviolet radiation with a frequency of 4.4 × 1015 hz? planck’s constant is 6.63 × 10–34

Along wire carrying a 4.2 a current perpendicular to the xy-plane intersects the x-axis at x=−1.7cm. a second, parallel wire carrying a 3.0 a current intersects the x-axis at x=+1.7cm. part a at what point on the x-axis is the magnetic field zero if the two currents are in the same direction? express your answer to two significant figures and include the appropriate units.