Sound Multiple Choice Questions and Answers 21 PDF Book Download

Sound MCQs, sound quiz answers 21 to learn high school online courses. Practice sound and sound waves multiple choice questions (MCQs), sound quiz questions and answers for physics class. Free e-learning tutorial on characteristics of sound, noise pollution, sound waves in physics, echo of sound test prep for high school teacher certification.

Study high school physics multiple choice questions (MCQs): level of noise recommended in most countries over an eight-hour workday is usually, with choices 85-90 db, 65-70 db, 75-80 db, and 45-50 db for online school degrees. Free physics study guide for online learning sound and sound waves quiz questions to attempt multiple choice questions based test.

MCQ on Sound Worksheets 21 PDF Book Download

MCQ: A normal conversation have sound intensities of 3×10-6Wm-2. decibel level for intensity is

  1. 50 dB
  2. 64.8 dB
  3. 70.5 dB
  4. 48.8 dB

B

MCQ: Level of noise recommended in most countries over an eight-hour workday is usually

  1. 65-70 dB
  2. 85-90 dB
  3. 75-80 dB
  4. 45-50 dB

B

MCQ: If a nurse counts 68 heartbeats in 1 minute, then period of heartbeats should be

  1. 1.9 s
  2. 2 s
  3. 0.88 s
  4. 3 s

C

MCQ: Human voice results from vibration of

  1. ears
  2. heart
  3. vocal chords
  4. muscles

C

MCQ: As compare to air, sound waves travel

  1. 3 times faster
  2. 5 times slower
  3. 5 times faster
  4. 2 times lower

C