Echo is a ___________ of 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. Microphone converts sound energy into ___________?

   A. Microwaves
   B. Electrical signals
   C. Optical Signals
   D. Heat energy

   Submitted by: Fahad Iqbal

4. Sound of frequency below 20 Hz is:___________?

   A. Audiosonic
   B. Infrasonic
   C. Ultrasonic
   D. Supersonic

   Submitted by: Fahad Mehsud

5. The speed of sound in air at sea level is approximately____________?

   A. 300 meter per second
   B. 320 meter per second
   C. 340 meters per second
   D. 370 meter per second

   Submitted by: ABDUL AZIZ KHAN

6. Sound cannot travel through __________

   A. Solid
   B. Liquid
   C. Gases
   D. Vaccum

   Submitted by: M Khobaib Tariq

7. A loudspeaker changes _________ energy into sound energy.

   A. Chemical
   B. Electrical
   C. Light
   D. Kinetic

   Submitted by: Danish Balani

8. Sound travels about ___________times faster in water than in air.

   A. 2
   B. 3
   C. 4
   D. 5

   Submitted by: Munwar Ali Sohu

9. Only male frog produce croacking sound because _________ ?

   A. Male frog can magnify their voice with the help of sound box.
   B. Male frog have three pair of vocal cord
   C. Female frog have larynx but no vocal cord
   D. Female frog have no larynx

   Submitted by: Rashid Mehmood

10. What do we call when the sound of frequency will be below 20 Hz?

    A. Audio sounds
    B. Infrasonic
    C. Ultrasonic
    D. Supersonics

    Submitted by: Shuaib Uddin