12:30 [- 76 Name: Physics Test-Waves & Sound Multiple Choice: (3 points each) 1.) A particular wave occurs once every 40 s. What is the wave's frequency? a. 40 Hz b. 25 Hz c. 5.0 x 10-2 Hz d. 2.5 x 10-2 2.) Which of the following is a wave whose source is some form of repeating motion? a. pulse wave b. transverse wave c. sine wave d. periodic wave 3.) Which of the following is a single non periodic disturbance? a. longitudinal wave b. periodic wave c. transverse wave d. pulse wave 4.) Two waves can occupy the same space at the same time because waves a. are matter b. do not cause interference patterns c. can reflect off of one another d. are displacements of matter 5.) Which of the following is the interference that results when individual displacements on the same side of the equilibrium position are added together to form the resultant wave? a. constructive b. complete constructive c. destructive d. complete destructive 6.) What is the fewest number of nodes that a standing wave can have? a. O b. 1 c. 2 d. 3 7.) Sound waves a. do not require a medium to travel b. are a part of the electromagnetic spectrum c. are transverse d. are longitudinal 8.) What determines the pitch of a musical instrument? a. intensity b. amplitude c. nodes d. frequency 9.) If you hear the pitch of a siren become lower, you know that a. neither you or the siren is moving b. you are moving toward the siren, or the siren is moving toward you c. you are moving away from the siren, or the siren is moving toward you d. you are moving away from the siren, or the siren is moving away from you 10.) Which of the following has a higher speed of sound? a. helium at 0 C b. air at 100 C c. water at 0 C d. copper at 0 C 11.) Which of the following is the condition that exists when the frequency of a force applied to a system matches the natural frequency of vibration of the system? a. pitch b. decibel level c. timbre d. resonance 12.) If the intensity of a sound is increased by a factor of 100, the new decibel level will be a. two units greater b. double the old one c. 10 times greater d. 20 units greater 13.) A difference of 10 dB means that the sound is a. twice as loud b. 10 times as loud c. 100 times as loud d. 1000 times as loud 14.) If a sound seems to be getting louder, which of the following is probably increasing? a. intensity b. frequency c. speed of sound d. wavelength 15.) Which of the following would not happen without an ear present? a. amplitude b. frequency c. intensity d. pitch O <