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MODULE 5.2 SOUND

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1WHAT IS SOUND?SOUND IS PRODUCED WHEN SOMETHING VIBRATES, MOVING BACK AND FOURTH VERY QUICKLY.
2WHAT IS A COMPRESSION?A REGION OF HIGH PRESSURE IN WHICH PARTICLES ARE CLOSE TOGETHER.
3WHAT IS A RAREFRACTION?A REGION LOW-PRESSURE PARTICLES WHICH IS SPREAD OUT TOGETHER.
4WHAT ARE SOUND WAVES?IS THE MOVEMENT OF ALTERNATING COMPRESSIONS AND INFRACTION.
5WHAT IS NEEDED FOR SOUND TO BE PRODUCED?VIBRATES, MOVING BACK AND FOURTH VERY QUICKLY
6WHAT IS A WAVE?CARRIES ENERGY FROM ONE POINT TO ANOTHER.
7WHAT IS A TRANSVERSE WAVE?A WAVE IN WHICH THE VIBRATION IS AT RIGHT ANGLES TO THE DIRECTION THE THE WAVE IS TRAVELLING.
8WHAT IS A LONGITUDINAL WAVE?A WAVE IN WHICH THE VIBRATION IS IN THE SAME DIRECTION AS THE WAVE IS TRAVELLING.
9WHAT IS AN ECHO?A SOUND THAT IS REFLECTED AND HEARD A SECOND TIMES.
10WHAT IS SONAR?THIS DIFFERENCE CAN BE USED TO CALCULATE THE DEPTH OF OBJECTS UNDERWATER, USING A TECHNIQUE CALLED SONAR.
11UNFURNISHED ROOMSOUND REFLECTS FROM THE HARD SURFACES AND CAUSES ECHOES.
12FURNISHED ROOMSOUND IS ABSORBED BY SOFT FURNISHINGS LIKE HEAVY CURTAINS, CUSHION AND FLOOR CONVERTING.
13ACOUSTICS MATERIALSUCH AS THIS CAN BE USED TO ABSORB SOUND IN BUILDINGS.