1. Speed of sound waves is 700ms-1. How long time will the waves take to travel 7 km?
2. A noise level of 100 decibel would correspond to
3. Law of superposition is applicable to only
4. Sound is heard over longer distances or rainy days because
5. Beats are the results of
6. The full form of SONAR is
7. In which of the following option sound may not be across travel?
8. The speed of sound in different medium at 25°C. Which of the following question regarding this statement is/are correct?
A. The speed of sound in oxygen is 316 m/min.
B. The speed of sound in distilled water is 1498 m/min.
A. The speed of sound in oxygen is 316 m/min.
B. The speed of sound in distilled water is 1498 m/min.
9. Bats detect obstacles in their path by receiving the reflected
10. Consider the following statements.
1. The heart vibrates at infrasonic.
2. The speed of sound is more in gas than in liquid and solid.
3. Mach number is used to describe the speed of sound.
4. Ultrasonic sound has frequency more than 20,000 Hz.
Of these statements.
1. The heart vibrates at infrasonic.
2. The speed of sound is more in gas than in liquid and solid.
3. Mach number is used to describe the speed of sound.
4. Ultrasonic sound has frequency more than 20,000 Hz.
Of these statements.
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