Author Question: A boat sounds a fog horn on a day when both the sea water and the air temperature are 25.0 C. The ... (Read 42 times)

tfester · **on:** Jul 28, 2018

A boat sounds a fog horn on a day when both the sea water and the air temperature are 25.0 C. The speed of sound in sea water is 1 533 m/s. How much earlier (in s) does a dolphin 1 000 m from the source hear the sound than a person in a boat that is also 1 000 m distant? (Ignore the time it takes the sound to reach the water surface.)
a. 0.652
b. 2.12
c. 2.24
d. 2.77
e. 2.90

Question 2

Earthquake waves are classified as P waves and S waves. Which of the following statements is true about these waves?
a. The P wave is transverse as is the S wave. b. The P wave is longitudinal as is the S wave. c. The P wave is transverse and the S wave is longitudinal.
d. The P wave is longitudinal and the S wave is transverse. e. Both the P and S waves are mixtures of longitudinal and transverse waves.