9M SOUND ACTIVITY BOARD by vijifrancis1230@gmail.com https://padlet.com/vijifrancis1230/q9qzth9cs7t9 L.O :- * Explain the propagation of sound in different medium based on molecular theory . of matter *analyse compressions and rarefactions produced as sound propagates in a medium. en-us 2017-10-02 16:42:16 UTC 2023-03-28 18:53:42 UTC hello@padlet.com Arjun and Siddharth s nair https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193703646 it is observed that when the tuning fork is struck with the rubber pad and makes contact with water the frequency agitates the water molecules and make them vibrate highly similarly if a grenade is thrown in water the explosion will displace the water on a large wave]]> 2017-10-04 04:15:21 UTC https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193703646 So https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193703658 2017-10-04 04:15:35 UTC https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193703658 Beavan and Suman https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193703664 The speed of sound varies from substance to substance: sound travels most slowly in gases; it travels faster in liquids; and faster still in solids. For example, , sound travels at 343 m/s in air; it travels at 1,484 m/s in water (4.3 timesas fast as in air); and at 5,120 m/s in iron.

Sound waves in solids are composed of compression waves (just as in gases and liquids), and a different type of sound wave called a shear wave, which occurs only in solids. Shear waves in solids usually travel at different speeds, as exhibited in seismolody. The speed of compression waves in solids is determined by the medium's compressibilty, shear modules and density. The speed of shear waves is determined only by the solid material's shear modulus and density.


]]> 2017-10-04 04:15:36 UTC https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193703664 Abel and Group https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193703678 2017-10-04 04:15:47 UTC https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193703678 Prahlad,Siddharth.M,Akshay and Vaibhav prahladprakriti https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193703756 A vibrating tuning fork is capable of creating such a longitudinal wave. As the tines of the fork vibrate back and forth, they push on neighboring air particles. The forward motion of a tine pushes air molecules horizontally to the right and the backward retraction of the tine creates a low-pressure area allowing the air particles to move back to the left.


]]> 2017-10-04 04:16:55 UTC https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193703756 Working of sound in solids epicsuman2003 https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193703759 Sound waves in solids are composed of compression waves (just as in gases and liquids), and a different type of sound wave called a shear wave, which occurs only in solids.]]> 2017-10-04 04:16:58 UTC https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193703759 Shreedhar J https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193703760 We hear through solids sometimes. Example: When we eavesdrop on doors, we can hear others talking.]]> 2017-10-04 04:17:00 UTC https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193703760 Sound waves need to travel through a medium such as a solid, liquid, or gas. The sound waves move through each of these mediums by vibrating the molecules in the matter. The molecules in solids are packed very tightly. Liquids are not packed as tightly as solids. And gases are very loosely packed. The spacing of the molecules enables sound to travel much faster through a solid than a gas. Sound travels about four times faster and farther in water than it does in air. This is why whales can communicate over huge distances in the oceans. Sound waves travel about thirteen times faster in wood than air. They also travel faster on hotter days as the molecules bump into each other more often than when it is cold. https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193703874 Vinayak]]> 2017-10-04 04:18:30 UTC https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193703874 Saran, Shaun, Mandarin https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193703904 2017-10-04 04:18:52 UTC https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193703904 Saran, Shaun,A vanish, Nandalal https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193703968 2017-10-04 04:19:42 UTC https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193703968 Bibin,Stevin,Vikram,Nidhin https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193704073 Propagation of sound is the Transmission of Acoustic Energy through a medium via a sound wave. Sound is a sequence of waves of pressure, which propagates through compressible media such as air or water or solid. During their propagation, waves can be reflected, refracted, or attenuated by the medium.  ]]> 2017-10-04 04:21:06 UTC https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193704073 Aditya R, Harsh, Pradhyumn, vinaya https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193704138 2017-10-04 04:21:53 UTC https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193704138 https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193704296 Vinayak ]]> 2017-10-04 04:23:19 UTC https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193704296 https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193704564 Sound is produced when something vibrates. The vibrating body causes the medium (water, air, etc.) around it to vibrate. Vibrations in air are called traveling longitudinal waves, which we can hear. Sound waves consist of areas of high and low pressure called compressions and rarefactions, respectively.
Vinayak nair]]> 2017-10-04 04:25:31 UTC https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193704564 How a sound wave is produced https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193704719 Sound is produced when something vibrates. The vibrating body causes the medium (water, air, etc.) around it to vibrate. Vibrations in air are called traveling longitudinal waves, which we can hear. Sound waves consist of areas of high and low pressure called compressions and rarefactions, respectively.

Akshay V]]> 2017-10-04 04:26:26 UTC https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193704719 Rarefaction https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193704882 A decrease in the density of something is rarefaction. As you climb a mountain, you experience rarefaction of the air; the air becomes less dense the higher up you go.


]]> 2017-10-04 04:27:27 UTC https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193704882 Waves are made up of compressions and rarefactions. Compression happens when molecules are forced, or pressed, together. Rarefaction is just the opposite, it occurs when molecules are given extra space and allowed to expand. Remember that sound is a type of kinetic energy https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193705042 2017-10-04 04:28:32 UTC https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193705042 https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193705190 2017-10-04 04:29:22 UTC https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193705190 Avanish and Nandalal https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193705266 2017-10-04 04:30:02 UTC https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193705266 The astronauts have devices in their helmets which transfer the sound waves from their voices into radio waves and transmit it to the ground (or other astronauts in space). This is exactly the same as how your radio at home works. https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193705744 Vinayak]]> 2017-10-04 04:34:02 UTC https://padlet.com/vijifrancis1230/q9qzth9cs7t9/wish/193705744