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प्रश्न
Lightning can be seen the moment it occurs. Paheli observes lightning in her area. She hears the sound 5 s after she observed lightning. How far is she from the place where lightning occurs? (speed of sound = 330 m/s).
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उत्तर
Distance = 330 ms × 5s = 1650 m
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संबंधित प्रश्न
What is sound ?
Draw a graph between displacement from mean position and time for a body executing free vibrations in vacuum.
Give two examples each of longitudinal waves and transverse waves.
How does the velocity of a wave vary with temperature?
Arrange the speeds of sound in gases, solids, and liquids in ascending order.
Match the pairs.
| Group ‘A’ | Group ‘B’ |
| (a) Flute | (1) Frequency less than 20 Hz |
| (b) Frequency | (2) Frequency more than 20000 Hz |
| (c) Sound level | (3) Vibrations in the air |
| (d) Ultrasonic sound | (4) Measured in Hz |
| (e) Infrasonic sound | (5) Decibel |
How is the sound produced?
What is the effect of temperature and pressure on the speed of sound in a gas?
Rapid back and forth motion of a particle about its mean position is called _____.
Vibrations in a body produce ______.
