Shaalaa.com | Characteristics of Sound: Wavelength, frequency, time period
The velocities of sound waves in four media P, Q, R and S are 18,000 km/h, 900 km/h, 0 km/h and 1200 km/h respectively. Which medium could be a liquid substance?
Through which of the following materials can sound travel? wood, air, water, steam, ice, hydrogen, steel, diamond.
Why cannot a sound be heard on the moon? How do astronauts talk to one another on the surface of moon?
An electric bell is suspended by thin wires in a glass vessel and set ringing. Describe and explain what happens if the air is gradually pumped out of the glass vessel.