Sains Tingkatan 2 Bab 10: Gelombang Bunyi / Sound Waves

Bunyi merupakan gelombang?

What type of wave does sound is?

• Gelombang mekanikal (tidak dapat merambat melalui vakum)

  Mechanical wave (cannot pass through vacuum)

• Gelombang elektromagnetik (boleh merambat melalui vakum)

  Electromagnetic wave (can pass through vacuum)

• Gelombang mekanikal (boleh merambat melalui vakum)

  Mechanical wave (can pass through vacuum)

• Gelombang infrared (boleh merambat melalui vakum)

  Infrared wave (can pass through vacuum)

__________ bergantung kepada frekuensi gelombang bunyi manakala __________ bergantung kepada amplitud gelombang bunyi.

__________ depends on the frequency of sound wave while __________ depends on the amplitude of the sound wave.

• Kelangsingan bunyi;kenyaringan bunyi

  Pitch of the sound;loundness of sound

• Kenyaringan bunyi;kelangsingan bunyi

  Loudness of the sound;pitch of sound

Antara berikut, objek yang manakah boleh memantulkan bunyi dengan baik?

Which of the following object can reflect sound?

• 
• 

Antara berikut, objek yang manakah penyerap bunyi yang baik?

Which of the following object is a good sound absorber?

• 
• 

Semakin kuat bunyi semakin rendah amplitud bunyi.

The louder the sound the lower the amplitude of the sound.

• Betul

  True

• Salah

  False

Semakin rendah frekuensi gelombang bunyi semakin rendah kelangsingan bunyi.

The lower the frequency of sound wave, the lower the pitch of the sound.

• Betul

  True

• Salah

  False

Pilih jawapan yang betul dengan kadar kelajuan pemindahan suara yang semakin meningkat.

Choose the correct answer with an increasing speed of sound transfer.

• Gas, pepejal, cecair

  Gas, solid, liquid

• Cecair, pepejal, gas

  Liquid, solid, gas

• Pepejal, gas, cecair

  Solid, gas, liquid

• Gas, cecair, pepejal

  Gas, liquid, solid

Semakin rendah suhu semakin laju kelajuan bunyi.

The lower the temperature the faster the speed of sound.

• Betul

  True

• Salah

  False

Amplitud merupakan?

What is mean by amplitude?

• Bilangan getaran bunyi dalam satu saat

  Number of sound vibration in one second

• Pengukuran skala magnitud ayunan sesuatu gelombang

  Magnitude scale measurement of wave oscillation

Sonar merupakan teknik yang menggunakan ____________ bunyi untuk navigasi, komunikasi atau mengesan objek di bawah permukaan air dan mengukur kedalaman.

Sonar is a technique that uses sound __________ to navigate, communication or detect objects under the water and measure depth of water.

• perambatan

  propagation

• hentaman

  hit

• kesan

  effect