Advertisements
Advertisements
प्रश्न
What are fishing boats?
Advertisements
उत्तर
These boats are provided with SONAR which stands for Sound Navigation and Ranging. The sound is the ultrasound which enables boatsmen to exactly pinpoint the location of fish in deep water. SONAR not only gives the distance but also the exact location of the prey.
संबंधित प्रश्न
How is the frequency of a stretched string related to its length?
Define wavelength term in relation to a wave.
State the use of echo by a bat, dolphin and fisherman.
Define the term Frequency (as applied to sound waves)
What are infrasonic waves?
State two factors on which the natural frequency of a body depends.
A radio signal, sent towards the surface of the moon, is received in 2.5 seconds. If the speed of the radio waves is 3 × 108 ms−1, find the distance of the moon from the earth.
A sound wavelength of 0.332 m has a time period of 10−3 s. If the time period is decreased to 10−4 s, calculate the wavelength and frequency of the new wave.
What is meant by an echo? Explain.
