Why do sound waves move faster through the ground than through the air?
Particles of matter are packed more tightly in the ground than in the air. The reason is that sound waves are vibrations of the molecules of the medium: therefore, if the particles of the medium are closer together (as in solids), the vibrations can be transmitted faster, and the wave can travel faster.
Do sound waves travel faster through air or ground?
Normally the ground is warmer than the air above, so air temperature decreases with height in the troposphere (up to about 8 miles). Sound travels faster in warmer air, so the sound waves are refracted upward, away from the ground.
Which is a good sound absorber?
In general, soft, pliable, or porous materials (like cloths) serve as good acoustic insulators – absorbing most sound, whereas dense, hard, impenetrable materials (such as metals) reflect most. How well a room absorbs sound is quantified by the effective absorption area of the walls, also named total absorption area.
Why can’t you hear a bell in a vacuum?
Radio waves travel perfectly fine through a vacuum because they are a type of electromagnetic wave (light), and electromagnetic waves do not need a medium to travel through. Because of this vacuum, you can no longer hear the bell jingle until you allow air to enter the bottle.
Does the sound travel in the absence of the medium explain with an activity?
Answer. No sound cannot travel in the absence of medium. You can see the bell jar experiment on YouTube.
Why do we not get echo in all the rooms?
So, our distance from the sound reflecting surface and then coming back to us is 34.4.So, the distance from the reflecting surface to hear an echo should be half of 34.4m i.e 34.4/2= 17.2m. A room is much smaller than 17.2m therefore we can’t hear echoes in a room.
Who was the first person to show that sound needs a material to travel through?
The brilliant English scientist known as Robert Boyle (1627–1691) was the first person to discover that sound needs a medium to travel through. He conducted an experiment where he placed an alarm clock inside of a large glass jar, and made it ring.
How does sound travel explain it with diagram?
Sound is a form of energy that is transferred from one point to the another in the medium in form of longitudinal waves in case of gases and liquids and transverse waves or longitudinal waves in solids. Sound requires a material medium of finite elasticity and density to travel.