Which from the following is true for “Sound”?

Related Mcqs:

1. The echo (reflected sounD. will be distinctly heard only at ordinary temperatures if the distance of the reflecting surfaces from the source of sound is at least ________?

   A. 1120 ft
   B. 120 ft
   C. 56 ft
   D. 100 ft
   E. None of these

2. Name the branch of science which deals with the study of sound and sound waves?

   A. Aeronautics
   B. Acoustics
   C. Aerostatics
   D. Aetiology

   Submitted by: ABDUL HAYEE

3. Which statement about sound is true?

   A. Sound can’t travel through  vacuum
   B. Sound can’t travel through  glass
   C. Sound can’t travel through  water
   D. Non of theses

   Submitted by: Daniyal Rehman

4. When sound waves travel from air to water which of the following quantities remains unchanged?

   A. Speed
   B. Frequency
   C. Intensity
   D. Wavelength

   Submitted by: Rashid Mehmood

5. Which of the following is used for hearing the sound of heart and lungs?

   A. Steroscope
   B. Stethoscope
   C. Oscillator
   D. Oncolator

   Submitted by: Farhan Rana

6. The cracking sound heard when dry hair is combed with a hard rubber comb is due to_________?

   A. The hair barging against the charged comb
   B. Small electric sparks
   C. The rubbing of the comb with the hair
   D. None of the above

7. The approximate intensity level of the sound which can cause damage to the ear drum is?

   A. 20 dB
   B. 60 dB
   C. 100 dB
   D. 160 dB

8. Sound travels_______ in solid materials then liquid?

   A. Constant
   B. Slowest
   C. Fastest
   D. None of these

   Submitted by: Ghulam Murtaza

9. Velocity of sound in air does not change with the change of?

   A. Temperature of air
   B. Pressure of air
   C. Moisture content in air
   D. Wind in the direction of propagation of sound

   Submitted by: Malik Asghar Hussain

10. Speed of sound in water at 20 °C is___________?

    A. 1450 m/s
    B.1474 m/s
    C. 1498 m/s
    D. 1500+ m/s

    Submitted by: ARIF HUSSAIN