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 principle used in radar is the same as that of Sonar. In radar we use radio waves ; whereas in sonar we use ?3A body can escape the gravitational pull of the earth if it is thrown up with a velocity of?4The cracking sound heard when dry hair is combed with a hard rubber comb is due to_________?5The approximate intensity level of the sound which can cause damage to the ear drum is?6The Largest Producer of Electricity in the Islamic World is______________________?
Answer and explanation
Correct Answer: A: Space waves
Explanation: The correct answer is A: Space waves. The waves used for line of sight (LOS) communication are called space waves. These are electromagnetic waves that travel in a straight line from transmitter to receiver, used for TV and microwave communication.
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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 principle used in radar is the same as that of Sonar. In radar we use radio waves ; whereas in sonar we use ?
- A body can escape the gravitational pull of the earth if it is thrown up with a velocity of?
- The cracking sound heard when dry hair is combed with a hard rubber comb is due to_________?
- The approximate intensity level of the sound which can cause damage to the ear drum is?
- The Largest Producer of Electricity in the Islamic World is______________________?