9N SOUND ACTIVITY BOARD day 2 by vijifrancis1230@gmail.com https://padlet.com/vijifrancis1230/p3bnovbld7zm L.O :- * Evaluate the propagation of sound in different medium. *Differentiate compressions and rarefactions produced in a medium. Analyse the characterisitics of a sound wave. Apply the characteristics of sound wave to real life situations. en-us 2017-10-01 15:57:56 UTC 2025-11-14 02:47:54 UTC hello@padlet.com vijifrancis1230 https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/192880567 2017-10-02 07:57:36 UTC https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/192880567 Dãthrï 9Ç https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193087713 => Sound is a form of energy produced by vibrating objects.
=> Vibration is a kind of rapid to and fro motion of an object.
=> When a vibrating object moves forward, it pushes and compresses the air is front of it creating a region of high pressure or height density. This region is called a compression.
=> When the vibrating object moves backwards, it creates a region of low pressure or low density called rarefactions.
=> In sound propagation, it is the energy of the sound that travels and not the particles of the medium.
=> Propagation of sound can be visualized as propagation of density variations or pressure variations in the medium.
=> There are 2 types of waves:- Tranverse and Longitudinal waves]]> 2017-10-02 16:27:01 UTC https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193087713 Rakshinda https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193088779 -> Sound is a form of energy which produces a sensation of hearing in our ears.
->Viberation means a kind of rapid to and fro motion of an object.
->Sound waves are Longitudinal waves.
->In a slinky the high density and high pressure part is known as compressions and the low density and low pressure region is known as rarefaction.
*All concepts clear. Sorry ma'am autocorrect *]]> 2017-10-02 16:28:51 UTC https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193088779 https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193097098 2017-10-02 16:43:42 UTC https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193097098 https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193097253 😇Thåńk Ÿøû Må’åm💝]]> 2017-10-02 16:43:57 UTC https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193097253 https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193107575 Sound is a form of energy made by vibrations

Sound travels faster in solids than liquids and least in gases; this is becsuse if the intermolecular spaces and force of attraction between particles.]]> 2017-10-02 17:03:11 UTC https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193107575 https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193110977 sound is in the form of logitudinal waves.


]]> 2017-10-02 17:09:44 UTC https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193110977 chanelledab https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193122749 chanelle
Sound is a form of energy caused by vibrations
Sound travels on the form of waves from one place to another .sound travels fastest in solids,slower in liquids in comparison to solids and slowest in gases.The 
travelling of sound is also called as propogation of sound.the distdisturbane from one location to another accompanied by the trsfer of energy iis called wave .the 2 types of waves are transversal wave and longitudinal wave.the wave formed by the oscillation perpendicular to the disturbance is called transversal wave.the wave formed because of thoscillationpare oscillation parallel to the disturbance is called longitudinal wave.]]> 2017-10-02 17:30:17 UTC https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193122749 level 1challenge vijifrancis1230 https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193243245  Explain an innovative method to prove that sound requires a medium to travel.
OR
 How do astronauts communicate in the  International Space Station
Links to explore more on applications of sound characterisitcs
http://www.physicsclassroom.com/class/sound/Lesson-3/http://www.learnnc.org/lp/editions/biomusic/6517 ]]> 2017-10-03 00:54:53 UTC https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193243245 level 2 vijifrancis1230 https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193249734 1.The distance between two consecutive compressions or two consecutive rarefactions formed in a medium when a sound wave travels is called
 (A) wavelength. (B) frequency. (C) amplitude. (D) displacement 

2.Figure shows a waveform of frequency 50 Hz in a string. The numbers in the string represent distance in centimeter. For this wave motion, find:
         (a) wavelength (b) amplitude, and (c) velocity 

3 Ocean waves of time period 0.02s have a speed of 10m/s. Calculate the wavelength of these waves. Find the distance between the adjacent crest and trough.
level 3
.1) Fill in the blanks:
1. The speed of sound ______________as it moves from solid to gaseous state.
2. In any medium the speed of sound _____________with increase of temperature
3. Sound is produced due to ____________of different objects.
4. Sound travels as successive ______________and _______________in the medium.
5. The distance between two successive compression or two consecutive rarefactions is called the ---------------
6. The change in density or pressure from a maximum value to a minimum and then back to the maximum is called 
     an_________________
7. The number of periodic oscillations per unit time is called the ____________________of the sound 
     wave..
Q.2) A sound wave has frequency of 4KHz and wavelength of 50cm.It takes 5s to travel .calculate the distance it  travels.
 








]]> 2017-10-03 01:45:50 UTC https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193249734 vijifrancis1230 https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193249820 2017-10-03 01:46:40 UTC https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193249820 Justin Lalu and Ibrahim Shaik https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193746575 2017-10-04 08:28:12 UTC https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193746575 Adhel. sound and light waves https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193746591 Light travels as transverse waves and can travel through a vacuum. Sound travels as longitudinal waves and needs to travel through a solid, liquid or gas: it cannot travel through a vacuum]]> 2017-10-04 08:28:15 UTC https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193746591 Adhel https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193750256 2017-10-04 08:42:13 UTC https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193750256 Adhel https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193750637 Light travels as transverse waves and can travel through a vacuum. Sound travels as longitudinal waves and needs to travel through a solid, liquid or gas: it cannot travel through a vacuum.

Light and sound can be reflected and refracted, just like water waves. Light and sound can also be diffracted, just like water waves, but diffraction in light is less obvious than in sound. 


]]> 2017-10-04 08:43:35 UTC https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193750637 RIINNAASSHH important characteristics of light are brightness, colour, and temperature. Brightness does not need much explanation, but colour and temperature are slightly more subtle concepts. Light is electromagnetic radiation visible to the human eye https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193750686

]]> 2017-10-04 08:43:44 UTC https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193750686 Abin https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193751054 Light travels as transverse waves and can travel through a vacuum. Sound travels as longitudinal waves and needs to travel through a solid, liquid or gas: it cannot travel through a vacuum.]]> 2017-10-04 08:44:56 UTC https://padlet.com/vijifrancis1230/p3bnovbld7zm/wish/193751054