mediumFPSCNTSCSSPPSCPhysics
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View all1The echo (reflected sounD. will be distinctly heard only at ordinary temperatures if the distance of the reflecting surfaces from the source of sound is at least ________?2The waves which are used for line of sight (LOS) communication are called:3The cracking sound heard when dry hair is combed with a hard rubber comb is due to_________?4A body can escape the gravitational pull of the earth if it is thrown up with a velocity of?5Who was the first scientist to successfully measure the speed of light using observations of Jupiter’s moon Io?6The approximate intensity level of the sound which can cause damage to the ear drum is?
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Correct Answer: C: Ultrasonic
Explanation: The correct answer is C: Ultrasonic. In sonar, ultrasonic sound waves are used instead of radio waves. Sonar sends out ultrasonic pulses and detects echoes reflected from underwater objects to determine their distance and location.
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- The echo (reflected sounD. will be distinctly heard only at ordinary temperatures if the distance of the reflecting surfaces from the source of sound is at least ________?
- The waves which are used for line of sight (LOS) communication are called:
- The cracking sound heard when dry hair is combed with a hard rubber comb is due to_________?
- A body can escape the gravitational pull of the earth if it is thrown up with a velocity of?
- Who was the first scientist to successfully measure the speed of light using observations of Jupiter’s moon Io?
- The approximate intensity level of the sound which can cause damage to the ear drum is?