p101chap15pretest

p101chap15pretest - Chapter 15: Making Waves 1....

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 15: Making Waves 1. Electromagnetic waves are generally A. transverse waves. B. longitudinal waves. C. a 50/50 combination of transverse and longitudinal waves. D. standing waves. Answer: A 2. The period of a sound wave is the A. end of the wave. B. decade in which it is produced. C. inverse of its frequency. D. None of these. Answer: C 3. The Doppler effect refers to changes in a sound wave’s A. amplitude. B. duration. C. frequency. D. speed. Answer: C 4. If the speed of sound is 1100 feet per second and a tuning fork oscillates at 440 cycles per second, what is the wavelength λ of the sound produced? A. 11 feet B. 4.4 feet C. 0.4 feet D. 2.5 feet Answer: D 5. On a day when the speed of sound in air is 340 m/s, a lightning bolt is observed and the resultant thunderclap is heard 5 seconds afterwards. About how far away was the lightning bolt? A. 1700 m B. 88,000 m C. 68 m D. 1020 m Answer: A 6. You hear a musician playing a series of notes of increasing frequency. As the frequency increases, the wave speed A. decreases. B. stays the same. C. increases. Answer: B
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
7. Suppose an audible sound wave were being produced at a frequency of 800 cycles per second. If the frequency were doubled, the sound would become A. higher in pitch. B. louder. C. lower in pitch. D. softer. Answer: A 8. Jim the meteorologist has predicted fair weather all day, but sees flashes of lightning followed by rolls of thunder. To calculate the distance to the lightning bolt, Jim should measure the time between the instant he first sees a lightning flash and the A. instant the lightning flash is over. B. instant he hears the beginning of the next thunder roll. C. instant he hears the middle of the next thunder roll. D. instant he hears the end of the next thunder roll. E. instant he sees the beginning of the next lightning flash. Answer: B 9. As a wave passes from one medium into another, it often happens that its speed increases with no change in frequency. Under these circumstances, the wavelength A. decreases. B. stays the same. C. increases. Answer: C 10. Two musical strings have the same length and tension, but string A has four times the mass of string B. The speed of a wave on string A is A. one fourth the speed of a wave on string B. B.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 8

p101chap15pretest - Chapter 15: Making Waves 1....

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online