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Devhuti
Subject: Science
, asked on 16/1/18
name any two animals that use ultrasound for navigation and location of food in the dark state the process.
Answer
1
Devhuti
Subject: Science
, asked on 16/1/18
a) Distinguish between music and noise. mention any three points.
Answer
1
Bhavya Biswas
Subject: Science
, asked on 16/1/18
simple defination of speed of sound waves
Answer
1
Devhuti
Subject: Science
, asked on 16/1/18
what is ultrasound? name two animals which produce ultrasound
Answer
4
Devhuti
Subject: Science
, asked on 16/1/18
WHAT KIND OF WAVES ARE SOUND WAVES?SHOW GRAPHICAL REPRESENTATION OF SOUND WAVE AND MARK THE POINTS OF COMPRESSION AND REFRACTIONS.
Answer
2
Mohd Anas Khan
Subject: Science
, asked on 15/1/18
Q.26 a) Name one instrument based on reflection of sound . b) While doing the experiment " To verify the laws of reflection of sound "a student choose what type of pipe ? Choose the right option . (i) Narrow pipe or broad pipe . (ii) Length more than 1 meter or length less than 1 meter .
Answer
5
Tejas Goyal
Subject: Science
, asked on 14/1/18
Q A horn emitting a sound of frequency 600 cycles per second is first blown in air and then under water. If the velocities of sound in air and water are 340 m/s and 1360 m/s respectively. Then the ratio of their wavelengths in air and water will be?
Answer
1
Tejas Goyal
Subject: Science
, asked on 14/1/18
Q How does the following factors affect it at all the velocity of sound in air ?
pitch of sound
temperature of air
pressure of air
moisture of air
Answer
1
Tejas Goyal
Subject: Science
, asked on 14/1/18
14
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Answer
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Tejas Goyal
Subject: Science
, asked on 14/1/18
↵
Q Represent graphically by two separate diagrams in each case
Two sound waves having the same amplitude but different frequency.
Two sound waves having the same frequency but different amplitude.
Two sound waves having the different amplitude and different wavelength.
Answer
1
Tejas Goyal
Subject: Science
, asked on 14/1/18
12 . Establish the relationship between speed of sound , its wavelength and frequency . If velocity of sound in air is 340 m/s calculate
(i) Wavelength wen frequency is 256 hz
(ii) frequency when wavelength is 0.85m
Answer
1
Tejas Goyal
Subject: Science
, asked on 14/1/18
Question9,10
Answer
2
Tejas Goyal
Subject: Science
, asked on 14/1/18
Question3
Answer
2
Rishika
Subject: Science
, asked on 14/1/18
Answer this science ques
Sound
13.
A ship sends out ultrasound produced by transmitter that returns from the sea bed and detected after 3.42 s. If the speed of ultrasound through sea water is 1530 ms
-1
, what is the distance of the sea bed from the ship ?
Answer
3
R. Lasyapriya
Subject: Science
, asked on 13/1/18
Please answer circled question
Answer
2
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What are you looking for?
(i) Wavelength wen frequency is 256 hz
(ii) frequency when wavelength is 0.85m
Sound
13. A ship sends out ultrasound produced by transmitter that returns from the sea bed and detected after 3.42 s. If the speed of ultrasound through sea water is 1530 ms-1, what is the distance of the sea bed from the ship ?