Physical Science Module #14 Test
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01. Define the following terms:
a. Transverse wave
b. Longitudinal wave
c. Supersonic speed
d. Sonic boom
e. Pitch
02. A recorder is a woodwind instrument in which the player blows into a tube, setting up a wave in the tube. A musician has 2 recorders. The first one is rather short, and the second one is significantly longer. Which recorder is capable of playing notes with the lowest pitch?
03. A popular science fiction moview was advertised with the slogan, "In space, no one can hear you scream." Why is this a true statement?
04. Do sound waves oscillate parallel to or perpendicular to the direction in which the wave travels?br>
05. What is the speed of sound in air that has a temperature of 25° C.?
06. A sound wave traveling through 17° C. air has a wavelength of 2 meters. What is the frequency of the sound wave?
07. which waves have the longest wavelength: sonic waves, infrasonic waves, or ultrasonic waves?
08. During a thunderstorm, the temperature is 10° C. If you see a lightning strike and then hear the thunder 2 seconds later, how far away did the lightning strike?
09. A ship blows its horn. Some of the sound waves travel through the air and then hit the water. Will the sound waves travel faster in the water or in the air?
10. A man and woman are ginging a duet. The man sings the low notes and the woman sings the high notes. The woman, since she is singing the melody, is louder than the man. Are the wavelengths of the man's sound waves longer than, shorter than, or the sdame size as those of the woman? Is the frequency of the man's sound waves lower or higher than those of the woman? What about the amplitudes of the waves? What about the speed of the sound waves?
11. A jet travels through 10° C. air at Mach 3. What is its speed in meters per second?
12. You are driving in a city that has a siren which sounds for 30 seconds every day at noon. You stop at a stoplight and then hear the sound of the siren. The stoplight then turns green, and you start driving. As you speed up, you notice that the pitch of the siren keeps getting higher. Are you driving towards or away from the siren? (Assume that the true pitch of the siren stays constant.)
13. An amplifier takes a 30 decibel sound and turns it into an 80 decibel sound. How many times larger is the intensity of the sound waves coming out of the amplifier as compared to the intensity of the sound waves going into the amplifier?