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What is the human audible range?

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Important Questions on Sound

EASY
Science>Physics>Sound>Types of Sound
A girl drops a ball from a height h=20 m. It strikes the ground elastically and returns to her hand. An echo of the thud of the ball striking the ground is produced from a nearby cliff. The echo is head at exactly the same moment when the ball returns to the girl's hand. (Take g = 10 ms-2  and vsound=350 ms-1). The distance of the cliff from the girls is close to:
EASY
Science>Physics>Sound>Types of Sound

A person clapped his hands near a cliff and heard the echo after 4 s. The distance between the cliff and the person will be :

(Speed of sound is 346 m s-1) 

EASY
Science>Physics>Sound>Types of Sound
Which of the following animal produce ultrasound?
EASY
Science>Physics>Sound>Types of Sound
If the velocity of sound in air is 340 m s-1 and x is the minimum distance between sound source and reflecting surface to get echo from general sound, then :
EASY
Science>Physics>Sound>Types of Sound
The acronym ‘SONAR’ stands for
EASY
Science>Physics>Sound>Types of Sound
Sound travels at a speed of 1450 ms-1through water. A submarine detects objects around it by sending sound waves and detecting echo (reflected sound) heard after 4 s. Then the object must be at a distance of:
EASY
Science>Physics>Sound>Types of Sound
A man who is standing at a distance of 850 m from a sound reflecting surface claps loudly. If the velocity of the sound in air is 340 ms-1 then the time taken by the echo to reach him is
EASY
Science>Physics>Sound>Types of Sound
Which of the following is not based on reflection of sound?
EASY
Science>Physics>Sound>Types of Sound
For verifying the laws of reflection of sound experimentally, the reflecting surface (screen) used should be
EASY
Science>Physics>Sound>Types of Sound
Sound whose frequency is below 20 Hz is called _____.
EASY
Science>Physics>Sound>Types of Sound
Animals like dolphin produce
EASY
Science>Physics>Sound>Types of Sound
Narrow metal tubes, well polished from inside, are used in this experiment. The tubes should be narrow in order to make sound waves
MEDIUM
Science>Physics>Sound>Types of Sound

While doing an experiment on verifying the laws of reflection of sound, four students measured the angles ∠i and ∠r as shown in the diagram below. The correct measurement of the angles of incidence and angles of reflection has been done by which student?

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EASY
Science>Physics>Sound>Types of Sound
While performing an experiment on verifying laws of reflection of sound, a student is to choose from (i) a narrow or a wide tube, and (ii) a strong or a faint source of sound.
The observed experimental difference, between the values of angle of incidence and angle of reflection, is likely to be minimum when he chooses a
EASY
Science>Physics>Sound>Types of Sound
Ultrasonic waves are made to reflect from various parts of the heart and form the image of the heart. This technique is called ____________________.
EASY
Science>Physics>Sound>Types of Sound
Warning sounds include _____.
EASY
Science>Physics>Sound>Types of Sound
The repeated reflection that results in the persistence of sound is called __________________.
EASY
Science>Physics>Sound>Types of Sound
If the reflecting surface used is a wooden board covered with woollen cloth, then the reflected sound heard at the end of tube B will be
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EASY
Science>Physics>Sound>Types of Sound
Which animal does not use the method of echolocation?
EASY
Science>Physics>Sound>Types of Sound
For doing the experiment on the verification of laws of reflection of sound,