Select Board & Class
What is the difference between loudness and intensity.
1.what do you understand by 1u or 1amu.
2.why is a bell provided with a big outer case?
Important questions of this chapter sound
what is the difference between Echo And Reverberation ?
WHAT KIND OF ENERGY TRANSFORMATION TAKES PLACE IN THE FOLLOWING DEVICES
What r the factors on which the speed of sound depends? Pls ans any1.. experts... quickly..
A cork on the surface of water moves up down completing five vibrations in 4s.The waves travel from a cork to the shore which is 20m away in 10s
calculate(a) the speed (b) frequency (c) wavelength
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 ?
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 .
why we cannot heard echo in small room?
why are sound waves called mechanical waves?
DIFFERENCE BETWEEN INTENSITY AND LOUDNESS OF SOUND?/
The blood pressure in humans is greater at the feet than at the brain. Why?
what are the avantages and disadvantages of echo and reverberation?
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 wave is moving with a speed of 3000 cm/s with reversal after every 0.01s. The wavelength of the wave is--------
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)?
1. A violin and a flute are both played at the same time in an orchestra. Both sounds travel through the same medium and arrive at our ear at the same time. Both sounds travel at the same speed irrespective of source but the sounds we receive are different. What are the characteristics that differentiate the two sounds?
why are the ceilings of concert halls made curved?
why sound wave are called as longitudinal wave?
a thin metal is placed agains the teeth of a cog wheel. the cog wheel is rotated at a speed of 120 rotations per minute and has 160 teeth. calculate (A) frequency if the note produced (B) the speed of sound , if the wavelength is 1.05 m
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
what will happen if we do the same process in the other direction?
what will happen to the voice of the person???
a sound wave causes the density at a place in air to oscillate 600times in 30s. find the time period and frequency of the sound wave.
plz tel me hw 2 do dis.
I want to make a SUPW project please give me some simple ideas.
A SONAR station picks up a return signal after 3 seconds.How far away is the object?(Speed of sound in water is 1440 m/s).
write all formula's in chapter sound ... and defines...???
The wavelength of sound emitted by a source is 1.7*10-2 m. Calculate the frequency of sound if the wave velocity is 343.4 m/s wave velocity.
reverberation? How can it be reduced?
name the particles which determine the mass of an atom
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
after emitting the, find how far is bat from obstacle and wave length of wave?
establish the relationship between speed of sound, its wavelength and frequency?
state the laws of reflection of sound .explain three application based on these laws.
Define echo?Give its two applications.
list three characteristics of sound waves. state the factors on which each of these characteristics depend...
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.
what is an echo? what are the two conditions required to hear an echo?
Why does sound make a light spot dance ?
describe an experiment to show that sound cannot pass through vacuum?
one side of a ripple tank ABCD is raised slightly, and a ripple tank started at P by a finger, After 1 secnd the shape of the ripple as shown.
a) why is it not circular?
b) which side of the tank has been raiseD?
Help me please. I have quiz tomorrow
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
how is echo formed?????????
The roof and walls of the auditorium are generally covered with sound absorbent materials like compressed fibreboard or draperies. Why is it so?(
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?
What are the uses of multiple reflection of sound ?
is speed and frequency denoted by the same letter???????
on what factor does the quality of a sound depend?
which of the following can be used to find the focal lenght of convex lens ?
object at a distance of 10cm for lens of focal lenght 30cm
light from a laboratory window
light from sun
light from a tree next to the window
Explain how a human ear works
Why bryophytes and pteridophytes grow in moist and shady places? plzz tel me anyone
Name three devices which work on the reflection of sound
A ray of light incident normally on water air surface. Then angle of refraction will be.
1. 90 deg.c
2. zero deg.c
4. none of theses
Pl. tell me which is correct
what is altra sound ? Explain the use of altra sound in detecting defect in a metal block.
working model for sound as project. can suggest?
the time period of a sound wave travelling in a medium is T. if at a given instance (t=o) a particular region in the medium has minimum density. the density of this region will be maximum and minimum respectively again at......t=T and t=2T respectively....true or false
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
why would it be futile to attempt to detect sounds from other planets, even given the very best in audio detectors?
A human heart beats 75 times in a minute.Calculate its frequency
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
is the sum of angle of reflection and incidence always 90 degrees??????
property determines (a) loudness, (b) pitch?
Why the stage of an auditorium has curved background, curtains, carpets and false ceiling?
Copyright © 2021 Aakash EduTech Pvt. Ltd. All rights reserved.
E.g: 9876543210, 01112345678
We will give you a call shortly, Thank You
Office hours: 9:00 am to 9:00 pm IST (7 days a week)