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What is the difference between loudness and intensity.
Important questions of this chapter sound
A solid weighs 50 gf in air and 44 gf in when completely immersed in water. Calculate(i) the upthrust (ii) volume of the solid and (iii) the relative density of the solid
what is the difference between Echo And Reverberation ?
What r the factors on which the speed of sound depends? Pls ans any1.. experts... quickly..
waves propogate well in:
c)both a and b
d)none of these
1 WHAT IS MOST ESSENTIAL PROPERTY OF A WAVE MOTION AND WHY??
2GIVE FORMULA FOR TIME OF ECHO
3 GIVE 2 EXAMPLES OF TRANSVERSE WAVE
a person is listening to a tone of 500 Hz sitting at a distance of 450m from the source of the sound . What is the time interval between successive compressions from the source ?
why we cannot heard echo in small room?
what are the avantages and disadvantages of echo and reverberation?
why are sound waves called mechanical waves?
DIFFERENCE BETWEEN INTENSITY AND LOUDNESS OF SOUND?/
the sitar wire produces vibrations which are
(1) progressive transverse
(2) progressive longitudinal
(3) stationary transverse
(4) stationary longitudinal
The blood pressure in humans is greater at the feet than at the brain. Why?
Explain the working and applications of sonar.
what are uses of infrasonic sound
a stone is dropped from the top of a tower 500m high into a pond of water at the base of the tower . when is the splash heard ? g = 10m/s2 and speed of sound = 340m/s
a tuning fork produces 256 waves in 4 seconds. calculate the frequency of tuning fork.
A person has a hearing range from 20Hz to 20KHz. what are the typical wavelength of sound waves in air corresponding to these two frequencies?(Speed of sound =344m/s)?
why are the ceilings of concert halls made curved?
A wave is moving with a speed of 3000 cm/s with reversal after every 0.01s. The wavelength of the wave is--------
why sound wave are called as longitudinal wave?
a source of sound produces 20 compressions and 20 rarefractions in 0.2 seconds.the distance between a compression and rarefaction is 50cm . find the wavelength,frequency and time period of the wave.
please do answer it fast cuz tommorow is my finals.
a sound wave has a frequency of 2KHz and wavelength 35 cm.how long it will take to travel 1.5km?
what are the si unit of amplitude,freqency&wavelength
A slinky 5m long is tie to a hook in the wall & its other end is held tightly. It is then pulled in the direction opposite to the direction of the wall & released suddenly.
The disturbance created on the slinky are:
Transverse waves, Longitudinal waves, Transverse pulse, Longitudinal pulse
A stone is dropped into a well, 44.1 m deep. The sound of the splash is heard 3.13 s after the stone is dropped. Find the velocity os sound in air .
I want to make a SUPW project please give me some simple ideas.
a man fires a shot and hears an echo from a cliff after 2 sec. he walks 85m towards the cliff and the echo of the 2nd shot is now heard after 1.4sec. what is the velocity of sound and how far was the man from the cliff when he heard the eco first?
write all formula's in chapter sound ... and defines...???
a boy is standing in the middle of a big square field There is a tall building on one side of the field He explodes a cracker and hears its echo 0 4 second later What is the size of the aqure field (given = speed of sound in air is 330 m/s)
reverberation? How can it be reduced?
establish the relationship between speed of sound, its wavelength and frequency?
To Physics experts:
1.A boy is standing in the middle of a big square field.There is a tall building on one side of the field.He explodes a cracker and hears its echo 0.4 sec later.What is the size of the square filed.(speed of sound is 330m/s)
state the laws of reflection of sound .explain three application based on these laws.
list three characteristics of sound waves. state the factors on which each of these characteristics depend...
differentiate between crest and trough with more than 3 points (
Define echo?Give its two applications.
what is an echo? what are the two conditions required to hear an echo?
describe an experiment to show that sound cannot pass through vacuum?
how many vibrations will a tuning fork of frequency 280 hz will complete during the time sound travels forward in air by 18 cm.speed of sound in air be 336 m/sec
A source of wave produces 30 crest and 30 trough in 0.3 sec.What is the period of the wave?
how is echo formed?????????
an observer far away from a railway station hears the train starting.he sound arrives both from the steel rails and through air with a time difference of 3.5sec.how far is the railway station from the observer?the speed of sound in air is 350m/s and speed from steel is 5130m/s respectively?
The roof and walls of the auditorium are generally covered with sound absorbent materials like compressed fibreboard or draperies. Why is it so?(
how the human ear works.
Why are sound waves known as mechanical waves?
The frequency of a source of sound is 100 Hz . How many times does it vibrate in a minute?
how do bats use ultrasound to avoid colliding with walls
What are the uses of multiple reflection of sound ?
on what factor does the quality of a sound depend?
a student fixes two end of a rope to two rigid supports A and B placed at a distance of 7.5 m . He gives a transversal horizontal jerk to create a pulse in the rope which moves from A to B , B to A , again from A to B and B to A and so on . the movement he gives jerk to the rope his friend immediately starts the stopwatch . The pulse dies after completing three to and fro journeys from A to B and back . The pulse takes 1 min and 15 sec to complete its entire journey . What is the speed of the pulse moving on the rope ?
Explain how a human ear works
Why bryophytes and pteridophytes grow in moist and shady places? plzz tel me anyone
a sound produces 13 crests and 15 troughs in 3 seconds. when the second crest is produced the first is 2cm away from the source? calculate (a) the wavelength (b) the frequency (c) the wave speed.
Name three devices which work on the reflection of sound
working model for sound as project. can suggest?
A man standing between two parallel cliffs and fires a gun and hears two successive echoes after 4 second and 6 second the distance between the cliffs is (Speed of sound 330 ms-1)
(a) 1600 m (b) 1650 cm (c) 1650 m (d)1590 m
A human heart beats 75 times in a minute.Calculate its frequency
How is sound produced? explain with the help of an example
Does the sound of a bomb explosion travel faster than the sound of a humming bee?
a person standing between two vertical cliffs and 640m away from nearest cliff shouted he heard first echo after 4 sec and second echo 3 sec later. calculate
explain how bats use ultrasound to catch the prey
-a sound wave causes the density at a place in air to oscillate 600 ties in 30 seconds. Find the time period and frequency of the sound wave.
-a sound wave produces 20 crests and 20 troughs in 0.2 seconds. find the frequency of the wave.
-a person is sitting 200 m away from a 20Hz sound source. what is the time interal at which successive compressions from the source reaching?
WHAT KIND OF ENERGY TRANSFORMATION TAKES PLACE IN THE FOLLOWING DEVICES
property determines (a) loudness, (b) pitch?
name two physical quantities involved in the motion of sound in a medium.
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