Show with the help of an activity that sound cannot travel in vacuum,whereas it can travel in water.
Answers
Answered by
19
The bell jar experiment is a common experiment used to demonstrate that sound needs a medium to travel.
What is a bell jar?
A bell jar is a laboratory equipment used for creating a vacuum. It is so named as its shape is similar to that of a bell. A bell jar is placed on a base which is vented to a hose fitting that can be connected via a hose to a vacuum pump. By pumping the air out of the bell jar, the air pressure inside the jar can be varied.
How does the experiment work?
The experiment is done by placing an electrical bell in the bell jar. As the air is pumped out of the sealed bell jar, the sound from the bell jar fades. At a particular vacuum, no more sound is heard from the bell, but we can see that the hammer continues hitting the gong and sound is produced. However, the sound is not audible to our ears because of the vacuum inside the jar. This demonstrates that the sound wave cannot travel through vacuum. That is, a sound wave needs a material medium for its propagation.
Learning outcome
We can infer that sound needs a material medium for its travel.
hope so it will help u....
if you like my answer please mark it as the brainliest.
What is a bell jar?
A bell jar is a laboratory equipment used for creating a vacuum. It is so named as its shape is similar to that of a bell. A bell jar is placed on a base which is vented to a hose fitting that can be connected via a hose to a vacuum pump. By pumping the air out of the bell jar, the air pressure inside the jar can be varied.
How does the experiment work?
The experiment is done by placing an electrical bell in the bell jar. As the air is pumped out of the sealed bell jar, the sound from the bell jar fades. At a particular vacuum, no more sound is heard from the bell, but we can see that the hammer continues hitting the gong and sound is produced. However, the sound is not audible to our ears because of the vacuum inside the jar. This demonstrates that the sound wave cannot travel through vacuum. That is, a sound wave needs a material medium for its propagation.
Learning outcome
We can infer that sound needs a material medium for its travel.
hope so it will help u....
if you like my answer please mark it as the brainliest.
Ayushramavtar:
I also want how it travel in vacuum
but sound does not travel in vacumm dear
But it seems that in some circumstances, sound can jump between objects in a vacuum after all.Sound waves are travelling vibrations of particles in media such as air, water or metal. So it stands to reason that they cannot travel through empty space, where there are no atoms or molecules to vibrate
But read my question I want a activity to prove that sound cannot travel in vacuum but it can travel in water
ok getting u soon
For proving that sound travels in water. Requirements:
Plastic dollPlastic bagBucketWater
Procedure:
Take a squealing plastic doll and put it inside a clear plastic bag.Tie the mouth of the big with a strong cotton thread tightly.Place the plastic bag in a plastic bucket filled with water.
Squeeze the plastic doll. You will hear a faint sound.Now place your ear against the side of bucket and again squeeze the doll.You will hear a clear and louder squeal of the doll.
Plastic dollPlastic bagBucketWater
Procedure:
Take a squealing plastic doll and put it inside a clear plastic bag.Tie the mouth of the big with a strong cotton thread tightly.Place the plastic bag in a plastic bucket filled with water.
Squeeze the plastic doll. You will hear a faint sound.Now place your ear against the side of bucket and again squeeze the doll.You will hear a clear and louder squeal of the doll.
Answered by
9
The sound always need a medium to travel and it cannot travel in vacuum.
Explanation:
- There is a common activity of bell jar used to demonstrate that sound needs a medium to travel.
- In this experiment a bell jar is taken and the vacuum is created inside the jar.
- It is placed on a base which is connected to a hose fitting.
- The hose fitting is further connected to a vacuum pump.
- After pumping the air out of the jar, the jar is empty and there is no air pressure inside the jar.
- When the bell is rung, no sound is heard outside the jar as there is no medium through which sound can travel from on place to another.
Hence we can say that the sound always need a medium to travel and it can not travel in vacuum.
Also learn more
The speed of sound in air is 340 m/s. If the wavelength is 2.4 cm , what will be the frequency of sound wave ?
https://brainly.in/question/6595505
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