Which of the following statements best describes how sound travels through different materials?
Sound travels faster in solids than in liquids and gases.
Sound travels as a mechanical wave that depends on how closely packed and how strongly bonded the particles of a medium are. Solids have the most closely packed particles and strongest intermolecular forces, so sound travels fastest through solids, slower through liquids, and slowest through gases.
Hence, sound travels faster in solids than in liquids and gases.
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- A high-pitch and a low-pitch sound have ________, respectively.
- The radar used by police to check over-speeding vehicles works on the principle of
- Which one of the following is NOT an electromagnetic wave?
- Wavelength and frequency of a radio wave are 12 m and 25 × 106 Hz respectively. Calculate its velocity.
Ultrasonic pulse echo technique, a non-destructive ultrasonic testing, is employed for any possible flaw detection in a metallic bar of thikness 30 cm. If the arrival times of the ultrasonic pulses are 45 μs and 90 μs respectively, the distance of the flaw from one end of the steel bar at which the ultrasonic pulse initially enters the steel bar, will be:
