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Subject: Science, asked on 21/3/18

We cannot hear the echo produced in a classroom

Subject: Science, asked on 23/2/18

distinguish between the good and bad reflector of sound

Subject: Science, asked on 19/2/18

ncert sound class 9 .What are activity 12.1 and 12.2 observations?(pg no 160)

Subject: Science, asked on 12/1/18

Hydrogen gas is filled in two identical bottles A and B at the same temer ature . The mass hydrogen in the two bottles is 12g and 48g respectively. In which bottle will sound travel faster ? How many times as fast as the other?
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Subject: Science, asked on 27/1/22

Explain the advantages and disadvantages of the reflection of sound in every day life ?

Subject: Science, asked on 27/1/22

Which remedies should you use to reduce the echo in auditorium ?

Subject: Science, asked on 10/6/18

Q.1 pls explain with method

Subject: Science, asked on 17/1/19

Please explain quickly its urgent

Subject: Science, asked on 10/1/20

Sunil is standing between two parallel walls. The wall closest to him is at a distance of 660 m. If he shouts, he hears the first echo SF 4 seconds and another after another 2 seconds. Q. What is the velocity of sound in air? What is the distance between the two walls??


(Can you explain its steps in detail? )

Subject: Science, asked on 28/4/18

Q. Hiii what is mean by good morning                      

Ali
Subject: Science, asked on 1/12/21

what is meant by sound

Subject: Science, asked on 31/10/19

what is ultrasonic sound

Subject: Science, asked on 24/5/20

What is the full form of covid 19

Subject: Science, asked on 13/1/18

The velocity of sound ______ with an increase in the temperature of the medium

Subject: Science, asked on 13/1/18

Echocardiography is based on ____ waves

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