Jawapan

2016-10-06T16:24:56+08:00
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 wavesconsist of areas of high and low pressure called compressions and rarefactions, respectively.
2016-10-07T13:40:12+08:00
Sound is produced via vibration