A student beats a large drum and blows a high-pitched plastic whistle at the same time. Which property of the sound waves is the main reason why the whistle sounds so different from the drum?
The frequency of the sound waves is different for each instrument
A high-pitched whistle produces sound waves of much higher frequency than the low, booming sound of a drum, and frequency determines the pitch we perceive. Hence, the frequency of the sound waves being different is correct.
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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:
