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

Related Mcqs:

1. speed of sound in dry air at 20 °C is___________?

   A. 353 m/s
   B. 345 m/s
   C. 343 m/s
   D. none of them

   Submitted by: ARIF HUSSAIN

2. Sound travels in air at an average speed of nearly________ ?

   A. 1257 miles per hour
   B. 755 miles per hour
   C. 330 miles per hour
   D. None of these

   Submitted by: Rashid Mehmood

3. Speed of sound in air is _______km/h?

   A. 1347
   B. 243
   C. 1235
   D. 1495

   Submitted by: Warraich

4. 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

5. 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

6. 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

7. The salinity of sea water is determined by the amount of common salt (Sodium Chloride) in __________ of sea water.

   A. 1 gram
   B. 10 grams
   C. 1 kg
   D. 10 kg

8. 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

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. 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