When the sound intensity is above 120 decibel, what happen to human ears?

1126

---

What is meant by reflection of waves?

1054

---

What happens to the velocity of sound with the rise of temperature?

961

---

What are the essential characteristics of a wave?

968

---

Which property of sound is affected by change in air temperature?

986

---

What is periodic wave?

1107

---

What is the principle of superposition?

1002

---

Who did first record the sound?

1023

---

What is master oscillator?

1028

---

How is sound produced?

947

---

What is supersonic?

1056

---

What is melody?

1062

---

What ways can igneous rock form two ways?

811

---

How continental heat flow is produced?

846

---

What is loam soil?

854

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