Explain why one is able to distinguish between a note produced by a child and that produce by an old man.
2.Explain how noise can be minimized in a big room that is considered to a room.
3.what is meant by resonance
4.Explain why a vibrating metal sounds louder when it is pressed against a table top than when freely in air
5. State 3 characteristics of music note and a factor which each depends
6.Discuss briefly any four application of sound waves
Answers
Answer:
1.Due to the timber or quality of sound.
2.By adjusting the room using sound absorbing materials to reduce reverberation
4.By hitting the metal vibration is produced it greater frequency compared to when left freely in air
5.Amplitude frequency and wavelength
6.Ultrasonic waves can be used to clean delicate instruments without having to take the equipment apart. The instrument is held in a liquid. The ultrasonic waves make the liquid particles vibrate at a high frequency, which cleans the surfaces of the equipment.
Detecting flaws and cracks in metal: This works in the same way as scanning babies in the womb. The ultrasonic waves bounce off different surfaces in the metal. The time it takes for the waves to bounce back to the receiver allows us to work out the depth the wave has travelled into the metal.
Echocardiology-diagnosinh diseases by scanning heart from inside.
Ultrasonography used to display pictures or images as ultrasound penetrated the human body and different tyoes of tissues get reflecyed in different ways thus helping us to see inside the body.